Rocks and Minerals

Obsidian can be found in various locations worldwide, but it is commonly found in areas with recent volcanic activity. In the United States, obsidian can be found in places like the American Southwest, especially in states like Arizona, California, and Oregon. Look for areas with past volcanic activity, such as lava flows or volcanic fields, to increase your chances of finding obsidian glass or rocks. Be sure to research local regulations and obtain any necessary permits before collecting.

Halite rock is composed of the mineral halite, which is a form of salt (sodium chloride). It is a sedimentary rock that forms from the evaporation of salty water, typically found in areas such as salt flats or ancient seabeds. Halite rocks are easily recognized by their salty taste and cubic crystal shape.

No. Oceanic crust is recycled into the mantle through a process called subduction and new ocean floor is formed at mid-ocean ridges. None of the ocean floor is more than about 180 million years old. Some rocks on the continents are billions of years old.

Basalt has a lower density compared to rhyolite. Basalt is a mafic rock with higher iron and magnesium content, which makes it denser. Rhyolite, being a felsic rock with higher silica content, is less dense.

Bedrock is commonly referred to as the rock that lies right beneath the earths surface. Bedrock is different from other rocks because usually the surface just above the rock can warn away due to things such as the weather, which causes it to break and sometimes change in color.

The central Adirondacks contain mostly gneiss, schist, and marble as the primary types of metamorphic rocks. These rocks have undergone extensive heat and pressure in the Earth's crust, resulting in their distinctive textures and compositions.

Yes, graphite can burn under certain conditions. It will ignite at high temperatures in the presence of oxygen, typically around 700-900 degrees Celsius. Once ignited, it will continue to burn as long as there is a sufficient oxygen supply.

No, mineral fossilization typically requires water to transport minerals to the remains of the organism and facilitate the crystallization process. Water helps in the replacement of organic material with minerals, forming a fossil.

When minerals in igneous and metamorphic rocks melt, they become magma, which can eventually solidify to form igneous rocks. In sedimentary rocks, when minerals melt, they can alter the rock's texture and composition, leading to the formation of metamorphic rocks through processes like recrystallization and metamorphism.

Sedimentary rock is most similar to metamorphic rock as both types are formed through processes that involve heat and pressure. However, sedimentary rock is distinct in that it is made up of solid fragments of pre-existing rocks or minerals that have been compacted and cemented together over time.

Eroded and deposited sediments undergo the processes of compaction and cementation. Compaction involves the squeezing together of sediments due to the weight of overlying layers, while cementation occurs when minerals precipitate in the pore spaces between particles, binding them together to form a solid rock.

Metamorphic rock is formed under high temperature and pressures which are not present on the surface. The erosion processes at the surface are low temperature and pressure, and aqueous, which more closely match the formation processes of sedimentary rock. Thus one can see the process of erosion as the undoing of the formative process. This better matches sedimentary than metamorphic.

The rock you are describing is likely sandstone. Sandstone is a sedimentary rock composed of small sand-sized particles of quartz that are cemented together by other minerals, forming distinct layers. It typically has a light brown color due to the presence of iron oxide or other impurities.

Igneous rocks form from the cooling and solidification of molten lava or magma. Sedimentary rocks are created from the accumulation and compaction of sediments like sand, mud, or organic material. Metamorphic rocks form when existing rocks are subjected to high temperatures and pressures, causing them to recrystallize without melting.

When schist is further heated and squeezed, it can form gneiss, another type of metamorphic rock. Gneiss is characterized by its banded texture and high-grade metamorphism.

Dried mud does not typically turn into rock. Rock formation usually involves a longer process that includes pressure, heat, and mineralization. Dried mud may harden but is not the same as forming a rock.

Bubbles in basalt form during volcanic eruptions when dissolved gases in the molten rock are released as the lava cools and solidifies. As the lava rises to the surface, the decrease in pressure allows the gases to escape, creating bubbles in the rock.

i live in mid to central n.c.. i have found a few in the rowan co. area as a kid in the 60's and 70's. they do exist but are few and far between. i found them wile plowing fields. they appeared as ordinary rounded, oblong, dirty white to reddish, quartz stones till broken open. then the most often purplish spires, displayed there most beautiful crystalline brilliance. quartz is known to follow mineral streaks such as gold. n.c. being americas first gold state (reeds gold mine) in cabarus co. a neighboring county to rowan co.. so your answer is yes you can find them in n.c. that aren't in stores. but they just don't pop out at you, saying here i am. it takes work to come across them. and mostly found here in red clay type soils. theory has it, that concord n.c. was a site of volcanic activity. so geodes may have fallen from the sky from that event. concord is heavily laden with many large weathered boulders, buried and exsposed.

Chert is a type of sedimentary rock made up of quartz and has a cryptocrystalline structure. It is often considered the parent rock of flint, jasper, and agate due to their similar composition and formation processes.

No, fiberglass is not a mineral. Fiberglass is a man-made material composed of fine fibers of glass. Minerals are naturally occurring inorganic substances with a specific chemical composition and crystal structure.

instead of what was here that was irrelevant here is a actual answer

a igneous rock can wither away and turn into a sedimentary rock then go under heat and pressure to turn into a metamorphic rock then melt into magma and cool turning it back to a igneous rock

Sandstone is likely the sedimentary rock that was part of a beach, river, or stream environment. It forms from the accumulation and compaction of sand-sized particles, which are commonly carried and deposited by water in these environments.

55-58 HRC (Rockwell Hardness) typically indicates a high level of hardness and wear resistance in metals or materials. It signifies that the material has been heat-treated to achieve this level of hardness, making it suitable for applications requiring durability and strength, such as cutting tools or industrial components.

The mineral that fits this description is hematite. It can exhibit both metallic luster when freshly broken and nonmetallic luster when weathered. Hematite is an important ore for iron as it contains a high percentage of iron content, making it a valuable source for iron production.