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Geology

~55200 answered questions
Parent Category: Earth Sciences
Do you ever wonder why one river is straight and flows quickly while another meanders along curves and seems to be slow and peaceful, or how the mountains were formed? Geology is the study of the earth, its materials, and the processes acting upon them. It includes the study of rocks and minerals; and their formation, weathering, and metamorphosis. So, when you need an answer to a question about rivers, mountains, volcanoes, rock cycles, plate tectonics, or other geological aspects, our Geology category is the place to ask it.
The Silurian was 443 to 417 million years ago.
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Devonian Period The Devonian Period lasted from about 395 to 345 million years ago. It is part of the Paleozoic Era.
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The Mississippian Period was from about 345 million to 325 million years ago. It is part of the Paleozoic Era.The Mississippian and the Pennsylvanian (325 to 280 MYA) are often grouped together as the Carboniferous Period.
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According to the 2012 Geologic Time Scale the Permian Period of the Paleozoic Era lasted from about 298.9 million to 252.2 million years ago. It is the last (latest) period of the Paleozoic.
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The Paleozoic Era is the first and longest era in the Phanerozoic Eon, and is one of three, the two other eras being the Mesozoic and Cenozoic. Paleozoic is derived from Greek and means "ancient life." The Paleozoic lasted from roughly 542 to 251 million years ago, and is subdivided into six geolog…
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Ordovician Period The Ordovician Period of the Paleozoic Era lasted from about 490 million to 443 million years ago.
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Answer The Cambrian Period was from about 543 to 490 million years ago. It is the earliest period in the Paleozoic ("old life") Era. Until relatively recently paleontologists thought this marked the beginning of life. Primitive life is now know from the Pre-Cambrian Eon.
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According to the International Commission on Stratgraphy, the Jurassic period lasted from 199.6 million to 145.5 million years ago. It is the middle period of the Mesozoic ("middle life") Era. This is the period when the dinosaurs were predominantly present on the face of earth, various species of…
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Cretaceous Period The Cretaceous was about 145 million to 66 million years ago. The Cretaceous gets its name from the latin word for chalk, creta, because it includes the layers of this distinctive pure white limestone. It is the last period of the Mesozoic ("middle life") Era.
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The Mesozoic Era is the second era in the Phanerozoic Eon, and is one of three, the two other eras being the Paleozoic (which came before) and the Cenozoic (which came after). This is why it is called the Mesozoic, which is Greek for "middle life." The Mesozoic lasted from approximately 250 to 65 m…
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The Oligocene Epoch is in the Paleogene Period, coming before the Eocene Epoch. (previously considered as the Tertiary Period, which overlapped the Neogene and Paleogene) It was about 34 to 23 million years ago.
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The Tertiary Period (including the Pliocene, Miocene, Oligocene, Eocene, and Paleocene Epochs) lasted from about 65 million years ago to 1.8 million years ago. It is part of the Cenozoic Era, along with the Quarternary Period.
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The Pleistocene Epoch was from about 1.8 million to 11,000 years ago. The word means "nearly present" or "most new" in Greek. It is marked by the ice ages and the emergence of the human species.
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The Quaternary is the most recent geological time period, which started 1.67 to 2.4 million years ago depending on the area studied. The Quaternary is part of the Cenozoic ("new life") Era, along with the Tertiary Period. The Quaternary Period includes recent time (the last 11,000 years ago, since t…
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The Cenozoic Era is the third and current era in the Phanerozoic Eon, and is one of three, the two other eras being the Paleozoic and Mesozoic. Cenozoic is derived from Greek and means "new life." The Cenozoic began about 65 million years ago in the wake of the Cretaceous-Paleogene extinction event…
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It is on or close to the receiver dryer. GoodluckJoe
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%DETAILS% Answer check the motor mounts, they are probably broken. Front mount located under the rad side mounts located at front and rear of engine on the front wheel wells. Watch how much they move when the engine is turned over. There should be little or no movement. Anything other …
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most ford engines have 1-2-3-4 on the pass side of the engine and 5-6-7-8 on the drivers side front to back. ----------------------------------------------------------------------------------------------------- On a 1998 Lincoln Continental ( being a front wheel drive ) firewall 1-----2-----3---…
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It probably needs to be sand blasted and repainted. If it is just a little surface rust, wipe some penetrating oil on it.
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Phone number, no way.I'm sure you can e-mail him through the WWE or his management company though.   There really is no way to contact him.   You can go to the www.wwe.com and then go to the superstars.   you could try emailing him over the wwe but i dont think he would have tim…
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Ionized water is one of many products and panaceas that the wonky-water wellness industry flogs onto the large segment of the general public that lacks the scientific background to distinguish scientific fact from pseudoscientific hype when the two are closely intertwined.
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It was painted by an American artist named Clara Hoffman. Biographical information about her is scarce. She may have been born in North Carolina in 1862, but her death date is unknown. **** Without a visual reference how can you know it's that painting? This theme is a very common one, and there m…
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Regular cleaning can prevent buildup of staining material. Repair leaking, dripping faucets to stop staining. Lime or hard-water mineral buildup is dissolved by an acid. Vinegar or lemon juice may be rubbed over the stain, to dissolve. Do not leave on stain too long, as acids will eventually damage…
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If your builder knows what he is doing it should be waterproofGunite is not waterproof on its own. It needs a final waterproofing by means of plaster or paint.
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Consider using French drains (submerged piping in gravel that allows surface water to soak into the ground and flow up into the pipe) to carry the water to an appropriate pump/drain system.   -Don't apply anything 24-48 hours before forecasted rain. -Use grasses and groundcover native to the …
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The addiction to looking at, studying, or collecting rocks is easy to understand. First of all, rocks come in many sizes, shapes, colors, and patterns. Some have sparkly crystals or shiny faces. Some look like animal forms, mechanical devices or body parts. Once you look into the processes that lead…
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Uniformitarianism First, let's define uniformitarianism. It is the postulation that the geologic principles that operated in the past are the same as those that are operating today. The opposite view is supposed to be catastrophism, the postulation that Earth's geologic features are a result of s…
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Answer The Andes mountains, the Amazon basin, and the Nazca Plains. The Nazca plate is currently being subducted under the South American plate. The Amazon basin encompasses the largest drainage area in the world and the Amazon river is number one in terms of water discharge. The Brazilian Shield…
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A print would be highly unlikely, as the work "Rock of Ages, Sands of Time" comprises 544 panels, spanning the earth's geological history. It's available in book form at any major bookseller (or you can order it.)
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Knowledge of the Earth's interior is based on the reactions of seismic waves from earthquakes to the density and state of materials that they encounter. Seismic waves travel at differing speeds through different materials (and also, at different speeds through material of different states, i.e., liq…
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The Era of Ancient Life.
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Yes, it did. In asking and answering the question you have to consider exactly what Geology is. Geology is more than rocks, it is rivers and streams, land forms, beaches, reefs, channels, cliffs, mountains, hills and penninsulas; a myriad of things we look at and take for granted. Just looking at Eu…
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According to the University of Hawaii's answer: There are seven quintillion five quadrillion grains of sand on all the beaches of the world. That's a 75 with 17 zeros following! "75 with 17 zeros following" (7.5x10^18) is seven quintillion, five hundred quadrillion. But what's an extra 495 quadr…
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Same as anybody else, by appropriate exercise of those muscles. However, a 12-year-old may not yet have the hormonal support to develop anything terrifically impressive. And excessive intensity at this age could be harmful. Instead of doing exercises an adult would do, you should run a lot. Many 12 …
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You need to disconnect the pump and filter from the pool lines first, 2nd if you have you owners manual check to see how much sand you need to have to replace the old sand, if you do not have that info then you need to put the old sand in buckets to figure out how much needs to go back in its always…
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I would say:I'm improving myself by interviewing for this job. I feel this company has vision and opportunity that will allow me to continue to improve myself for some time.
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Types of Rocks and The Rock Cycle Sedimentary rock is formed when sediment (sand, mud, clay, and other small rock particles) is transported by wind or water to a point of rest, where it is compressed to extreme pressures from further overlying sediments over long periods of time and the gaps betw…
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It releases nutrients into the water and the lava cools. It can Also cause a tsunami. A tsunami is a giant wave that washes away entire cities. >:o
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The natural form of oil is called crude oil. Oil is developed from once living organisms that were transformed over geologic time into hydrocarbons from heat and pressure as the organisms were being buried and lithified. Straight from the earth, crude oil contains hydrocarbons plus small amounts of …
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Answer A coastal stack is a tall piece of rock left over when an arch in a cliff is eroded away.
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The supercontinent of Pangaea existed during the Permian. The interior of the content was mostly dry and desert like with more bountiful vegetation around the supercontinent perimeter.
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Answer In many OS's like WindowsNT, for example, a core dump is basically the computer barfing up everything it has in memory (ram) at that moment. WindowsNT, XP and 2000 use core dumps so that an administrator can perhaps recover from a system crash. OS's like Linux and Unix use core dumps as we…
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Answer It extended from roughly 251 million years ago (MYA) to roughly 65 MYA. The Mesozoic followed the Paleozoic Era and preceded the Cenozoic Era.
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Some of the minerals used might be: Aluminum = Bauxite Iron = Hematite, Limonite, others Quartz = Sand and potash Chromium = Chromite Copper = Chalcopyrite, Cuprite, many others Magnesium = Magnesia, Magnesite Zinc = Sphalerite, Zincite Gold = Gold + Silver in all degrees of mix as ore Tin …
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The same geology that exists today existed in the Permian. Extrusive, igneous, and metamorphic rocks, volcanoes, tectonic plate movements, mountain creation, etc.
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Geology vs. GeographyCorrection: Geology is the study of the origin, history, and structure of the earth. The study of minerals is mineralogy. The study of rocks is petrology. Mineralogy and petrology are sub-disciplines of geology.  One of the founders of geology thought the new science shoul…
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Quartz is a naturally occurring silicate mineral composed of silicon dioxide (SiO2). Its hardness is 7 on the Mohs scale and it is in the trigonal crystal system. Quartz possesses a glassy luster and does not exhibit cleavage. The average specific gravity of quartz is 2.62. Quartz can be found in al…
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A diamond is an allotrope (a form) of the element carbon. Other forms of carbon include graphite, which is the substance in pencil lead. A link is provided to the Wikipedia articles on diamond and on carbon.
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Answer Mines and minerals are managed by the provinces. In Ontario you could try calling the regional resident geologist @ 613-478-3161. Also try mindat.org for listings of where quartz can be found worldwide.
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The climate was warm and tropical, with lush vegetation.
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How to Get Gold Out of Rocks Here are opinions and answers from FAQ Farmers: Crush the rock to a sand-like consistency, then heat the sand past the melting point of gold. If it's real gold it will settle to the bottom. If it's fools' gold it will turn to iron and hydrogen sulfide gas and make a big…
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Answer Glass. Answer I would guess that the first marbles that people played with were round rocks found near streams. Later, they were made out of ceramic materials (see the link). However, the cat's eye and other types are made of glass. There are several hundred different glass designs--wi…
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Silver is extracted electrolytically by either the Moebius process, the Balbach-Thum process, or the Parkers process.
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2 plate tectonic plates that move away from each other. The most active divergent boundaries are between mid-oceanic ridges . A divergent boundary is an area in the Earth's crust where two plates have been pulled apart like at a spreading center.A divergent boundary is when two plates are moving aw…
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Answer Vacuum leak. Could also be the idle air control valve. Read this: http://rds.yahoo.com/_ylt=A0geu5Dx19NHdfsAi8FXNyoA;_ylu=X3oDMTE5MWc1cmxhBHNlYwNzcgRwb3MDMQRjb2xvA2FjMgR2dGlkA1FSVzJfMTE4BGwDV1Mx/SIG=12ug709tt/EXP=1205152113/**http%3a//www.tomco-inc.com/Catalog/27idle%2520air%2520contr…
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Most metals oxidize under the right conditions. Gold, platinum and palladium do not oxidize at room temperature, which is the reason they are used in jewelry and electronics. Stainless steel, titanium, tantalum and niobium are highly resistant to oxidation.Rust is iron oxide. The forms Fe2O3, Fe3O4,…
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Strictly, only iron and its alloys "rust" and all other metals do not, because the verb "rust" strictly means to form iron oxide from iron. The more general term for metals is "corrode", and almost all elemental metals except gold, platinum, iridium, osmium, rhodium, ruthenium, and palladium corrode…
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Seashells are, quite simply, the exoskeletons of mollusks. At Britannica.com, you can learn a good deal about the composition of seashells, including the three distinct substances involved: an outer layer of the horny substance conchiolin, an intermediate layer of calcite, and a smooth inner layer c…
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Oxygen, although giving us the ability to breath, is actually a corrosive element that eventually wears us down. Radiation from the sun in the form of Ultra-Violet rays can damage our skin and cause cancer. The environment provides us the food we eat, the air we breath, the water we drink, the …
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Waterfalls often cause erosion, but a waterfall is not a 'type' of erosion in itself. The power of the water, as it hits the bottom, picks up dirt and sand that act as abrasives, grinding away at the rock. PBS in the United States has recently shown a very impressive documentary about the formation …
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The San Andreas Fault marks the boundary between the Pacific and North American plates and would reflect the various lithospheric depths at points along it. Lithospheric depths are on average around 100 KM.
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Answer A 300-gallon filter? I have no clue. The industry rates filter on the diameter of the filter tank. So if you can cover the gallons to inches I can tell you how much sand you will need.
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Underground Crystals They are older; more time to form.
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Yes, if there is a lot of it floating on the surface. Take a look at a ditch or shallow pond anytime from midsummer to fall; sometimes the entire surface will be covered with a green slimy layer of algae up to an inch thick.
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Iron is used in a variety of products from pots, pans, fences, and ornamental items, but the vast majority of iron is used in the production of steel, used as a structural material in the construction of large projects like bridges and buildings, in fasteners, cookware, automotive parts, trains and …
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Though steel is the best sealant, there are chances of corrosion and deterioration of the material. Hydro Seal, Sports Seal, and Terra-foama are some commonly used sealants. These sealants are generally installed under the guidance of a skilled worker.
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These are the most deadly eruptions known. Other eruptions have been as big or bigger than these, but no one lived nearby to be threatened (for example the Valley of 10,000 Smokes eruption in Alaska in 1912). The Mt. St. Helens eruption in 1980 in Washington state was a far less dangerous eruption t…
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you should specify which ice age; there have been hundreds. As far as why, that is a great question, and I don't think anyone has the answer. Ice ages are tied pretty close with atmospheric carbon dioxide levels. Carbon dioxide, you have probably heard, is a greenhouse gas, meaning it traps heat on …
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Are you sure it's mold? I'm not sure it's mold you're looking at. You said "ground mold," and you also said it's green. Those two characterizations don't jibe with mold. Are you sure it's not ground moss or algae? Moss grows in shady, damp areas of your lawn or garden, right on top of t…
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How, not why It is frequently said that science can provide answers to the "hows" for almost EVERYTHING, for example how the electric kettle works, but not the "why" questions....
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Size matters All things being equal, size matters. If you have a truck-sized hunk of, say, lead (Pb), it will have more mass than a peanut-sized piece of the same material. But if you have two dissimilar materials, then size can be deceiving. Because materials have different densities, a small objec…
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Mauna Kea is the tallest mountain in the world when measured from base to summit The base of Mauna Kea is 19,678 feet below sea level and its summit is 13,796 feet above sea level. That gives Mauna Kea a total height of 33,474 feet from its base to its summit. Therefore, it is actually a taller mou…
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bacteria Indeed they are bacteria! The Gram stain is a common, inexpensive, and very useful test that Medical Technologists (laboratory workers in hospitals) do to help doctors diagnose and treat bacterial infections. The bacilli part simply means the shape of the bacteria. A bacillus is a rod-s…
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Answer I found a company that makes a few different products for glass and Plastic. They are Janvil. Their site is http://www.janvil.com . They have glass scratch removers for glass scratches and plastic polish
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Convection is heat transfer by movement hot matter as compared to cold matter bure to density differences in the presence of a gravity field. or heat transfer through moving currents
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Most Common Metals on EarthThe most common elements in the universe are listed in "atomic order" (1-118) on the periodic table. #1 Hydrogen. All elements are made through Fusion in stars. When stars explode (go super nova) they scatter these elements throughout the universe. Lithium is the most comm…
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No, it is inert.
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Angle of Repose I believe you mean the angle of repose and it differs slightly depending on the type of sand.
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You should know this, and wiki.answers, is not a reliable source. Because they get retards like me to write the answer.
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When Spain began conquering modern-day South America, they found large deposits of silver. They began collecting the silver to add to their already significant wealth.
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from an earthquake. Or probably erosion cutting through limestone. Like the way the Grand Canyon was made.
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Geologists study the Earth, including Earth's surface and interior. Geologists study the origin, history, and structure of Earth and the processes that shape it over time. A geologist is a contributor to the science of geology. Geologists study the physical structure and processes of the Earth. Thei…
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By definition the natural environment is the condition of living and non-living things which occur in a state substantially not influenced by humans. This means they exist and change only by natural forces like weather or predators for example rather than with human influence such as that in an urb…
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Iron is the only metal that can rust. The usual term for the destruction of a metal by oxidation is corrosion, and 'rust' or 'rusting' is the term for corrosion specific to iron and its compounds.
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Around active or inactive felsic lava volcanoes, or in glacial drift, transported from areas of felsic lava volcanoes.
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Answer no, extrusive because it is made by lava not magma.
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On average, at about the rate that fingernails grow, approximately 3-4 cm per year. This is variable, however, often even across an individual plate, from between 1-2 cm per year for the slowest moving plates to around 10 cm per year for the fastest.
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Wind Erosion Two processes of aeolian erosion?1. Deflation - wind entrains particles with a diameter of less than 60 micrometres. 2. Abrasion - entrained sediment is thrown against rock surfaces. ("wind-scouring").Hope this helps.
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Graphite in CanadaThere are 2 types of graphite - natural and synthetic. Natural graphite is black with a sub-metallic lustre, feels greasy and stains the fingers. Graphite is found mainly in METAMORPHIC ROCKS, most frequently in schist and as small crystals in impure marbles in association with oth…
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South American Continent South America, Central America, and the Falkland Islands.
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An increase in depth from the surface will be accompanied by an increase in temperature according to the geothermal gradient which will result in a 20-30 C increase for every kilometer of added depth to a certain point, where the rate of increase declines.
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Hot, steamy, with abundant rainfall, tropical in nature, perfect for plant and forest growth.
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One Answer Radiometric dating techniques (and not just one) associated with investigation of materials originating on Earth and from space allow for the estimate of 4.567 billion years (4.567 × 109 years). A link can be found below which has more information on how the figure was arrived at. This …
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The elastic rebound theory was developed by Harry Fielding Reid, an American geophysicist who was studying the 1906 San Francisco earthquake. He observed that points on the Earth's surface distant from the San Andreas fault had gradually moved prior to the earthquake whereas points on the surface d…
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The Discovery of Oil Natural oil seeps have been present since before the days of dinosaurs about 200 million years ago. Lighter oils evaporate in air leaving behind the heavier oils in tar pits. People have used this naturally occurring oil since the beginning of recorded human history. Oil …
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Answer Not technically. Bricks are really manmade rocks. Rocks are created by nature using heat, time and pressure. Man uses much lower pressures and lower heat levels and much shorter time frames to make a substitute that is uniform in size and easier to work with.
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Along the southern coast of Alaska is the Aleutian Trench.
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Avalanches An avalanche occurs when a mass of snow falls down a mountainside. That is because new snow (which is not wet) accumulates on a more heavy snow layer. Since the new snow layer is not compact, it could slide down toward the base of the mountain. Avalanches could be triggered by loud no…
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Schists are abundant in the Precambrian (Archeozoic and Proterozoic) rocks. Schists are usually the product of regional metamorphism of existing rock, usually sedimentary, but sometimes of fine grained igneous rock. Schist could therefore be found where eroded mountains reveal the rock, or in ar…
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