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Sedimentary Rock

Sedimentary rock is formed when minerals and other organic materials are deposited in layers by water, ice, wind, or mass movement such as mudslides.

799 Questions

What is the light refraction of sandstone?

Sandstone typically has a low refractive index due to its composition of mainly quartz and other minerals. Light passing through sandstone may experience minimal refraction or dispersion, depending on the specific mineral content and structure of the rock.

Sedimentary rocks are named according to what?

according to composition i.e. mineral grains, fossils, animal/plant matter, chemical composition etc. and grain size (gravel, sand, silt, clay)

for example sandstone is made up of mainly rock fragments or mineral grains (quartz, feldspar, clay) weathered form other rocks and has grains that are 1/16-2mm large.

What determines how rocks are grouped into the three different types?

Rocks are classified into the three categories, based on the method of their formation:

Three main categories -

igneous (solidified from magma/lava)

metamorphic (undergone change from applied heat/pressure)

sedimentary (deposited- can be clastic, biochemical and precipitated)

What are turbidites and how are they associated with graded bedding?

Turbidity currents usually originate along the continental slope and continue across the continental rise, still cutting channels. Eventually they lose momentum and come to rest along the floor of the deepest ocean basin. As these currents slow, suspended sediments begin to settle out. First, the coarser sand is dropped, followed by successively finer accumulations of silt and then clay. these deposits, called turbidites, display a decrease in sediment grain size from bottom to top.

Where did you probably find a deposit of limestone what type of setting did it form in?

Limestone is formed on the floor of ancient seas from the skeletal remains of marine organisms such as coral, forams and molluscs, etc.

Do other planets have sedimentary rocks?

Yes, other planets in our solar system also have sedimentary rocks. For example, the Mars rover Curiosity has discovered sedimentary rocks on Mars. These rocks formed through processes like erosion, deposition, and lithification, similar to how sedimentary rocks form on Earth.

What are three ways sedimentary rock forms?

Three main ways and are classified accordingly. Igneous rocks form from molten material called magma.

How thick is sedimentary rock in the interiors planes and why?

its actually really big im not sure how big but i know it is because i learned about this in 3rd grade (im in advanced) Why? because it's atmoshere makes it and the surfaceity its on and its position makes it be big (depending how it starts getting big ........ I know that )

What are the properties of sedimentary rock?

  • sedimentary rocks have layers showing the deposition of sediment at different time periods.
  • sedimentary rocks consists of lots of small grains. these grains maybe weakly and together so the rocks are often porous and maybe soft and crumbly.
  • sedimentary rocks often have fossils trapped with in them.
  • sedimentary rocks consist of layers of lots of small particals.

Can sedimentary rock change into other sedimentary rocks?

The sedimentary rock could, for instance, be found on a mountain and be crushed to dust by a huge ice glacier moving over it. The resulting dusty (or bigger) rock particles much later reach the lower end of the glacier and are washed into a lake or into the ocean where they sink to the bottom.

Wait, oh, maybe half a million years, and the particles that sank to the bottom might turn into another sedimentary rock, altogether.

Why are sedimentary rocks so important for understanding the history of the Earth?

Through observation of sedimentary rocks, geologists are able to analyze rock layers and date the rocks by testing the carbon in each sample.

How do cracks get wider in limestone?

Cracks in limestone can widen due to a combination of factors, such as physical weathering from water freezing and thawing, chemical weathering from acidic rainwater, and biological weathering from roots growing and expanding within the cracks. Over time, this continuous process of erosion can cause the cracks to widen significantly.

Do other rocks need to experience metamorphism to be changed into sedimentary or igneous rocks?

No. Any rock at the surface can be eroded, deposited as sediment, and then lithified into sedimentary rock. Most rock that melts into magma goes through a metamorphic phases first, however.

Is lead a sedimentary rock?

I think it is. I see alot of other sites that say that.