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How are clastic limestone and fossiliferous limestone deposition different?
Clastic rocks are sedimentary rocks formed from pre-existing fragments of minerals. Fossiliferous rocks are formed in the same way, except that they contain fossils.
What is the difference between fossiliferous limestone and oolitic limestone?
Fossiliferous limestone has larger fossils in the rock and is of biochemical composition where as the oolitic limestone doesn't have any fossils and has a chemical composition. The Oolitic limestone has spherical grains that resemble miniature pearls (they are called ooliths or ooids). Both do effervesce in diluted HCL(acid)
Is a petoskey stone clastic?
A "petoskey" stone was originally an fossiliferous (with a coral fossil), organic (sedimentary) limestone. The original limestone has been glaciated and pieces of the fossiliferous limestone containing the corals have been plucked form their bedrock matrix and rounded into pebbles as they have been carried along by ice. When the ice melted these pebbles have been dropped into whatever was below them. This means a petroskey stone is a clast in a "new", modern clastic rock. However the stones themselves are not originally from a clastic rock, they are sedimentary in origin.
What are the uses of Paleontology?
It alows one to understand and study past life and environments (habitats which supported that life or helped preserve or make the fossils) and provides a tile sequence which allows relative dating of fossiliferous rocks.
Which sedimentary rock is made of Skeletal remains of organisms?
Limestones are sedimentary rocks made of skeletal remains. Limestones are recognizable because they react with Acid. Crystalline limestone are micro skeletons with large visible crystals. Micritic limestone is lithographic limestone and it is basically fine grained mud with micro-skeletons. Fossiliferous limestone is made with whole fossils in my experience mostly shells. Coquina is parts of skeletons pressed together. The difference between coquina and fossiliferous is that coquina doesn't have whole fossils. Lastly there is chalk. This is a lot of microorganisms remains pressed together.
Depositional environment for fined-grained yellow-brown moderately sorted fossiliferous sandstone?
Answer Moderately sorted and fossiliferous would indicate perhaps a continental shelf depositional area.
How are clastic limestone and fossiliferous limestone deposition different?
Clastic rocks are sedimentary rocks formed from pre-existing fragments of minerals. Fossiliferous rocks are formed in the same way, except that they contain fossils.
HOW DOES fossiliferous form?
it first forms by someone taking the stone and rubbing it on the ground lol
How does fossiliferous limestone form?
it first forms by someone taking the stone and rubbing it on the ground lol
What kind of grains does limestone have in it?
Limestone is primarily composed of the mineral calcite and may be very fine-grained, oolitic, or fossiliferous.
What is the difference between fossiliferous limestone and oolitic limestone?
Fossiliferous limestone has larger fossils in the rock and is of biochemical composition where as the oolitic limestone doesn't have any fossils and has a chemical composition. The Oolitic limestone has spherical grains that resemble miniature pearls (they are called ooliths or ooids). Both do effervesce in diluted HCL(acid)
What caused Fossiliferous Limestone to be a cliff?
Exposure on a cliff face would be caused by erosion, uplift, or faulting of the crust in an area that was at one time under water.
If you examined a rock sample and observe fossils in it what type of rock does the sample represent?
Fossils are only found in rocks that are laid down on the surface of the Earth. The majority of fossiliferous rocks are therefore sedimentary BUT fossils are also occasionally found in lava flows (igneous rocks) - eg lava trees and in some metamorphosed sedimentary rocks (metamorphic rocks) - eg the "delabole butterfly"
How do you distinguish a sample of a calcarenite fossiliferous limestone from a sample of carbonite mudstone with fossil shells?
The calcarenite matrix will fizz when weak acids are applied. The carbonite mudstone matrix will not fizz.
Is a limestone made from precipitated calcite clastic?
No. Granite is igneous, formed from slow-cooling felsic magma.
Is a petoskey stone clastic?
A "petoskey" stone was originally an fossiliferous (with a coral fossil), organic (sedimentary) limestone. The original limestone has been glaciated and pieces of the fossiliferous limestone containing the corals have been plucked form their bedrock matrix and rounded into pebbles as they have been carried along by ice. When the ice melted these pebbles have been dropped into whatever was below them. This means a petroskey stone is a clast in a "new", modern clastic rock. However the stones themselves are not originally from a clastic rock, they are sedimentary in origin.
What are the uses of Paleontology?
It alows one to understand and study past life and environments (habitats which supported that life or helped preserve or make the fossils) and provides a tile sequence which allows relative dating of fossiliferous rocks.
