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Limestone is a boigenic rock. It is formed as a byproduct of living things, frequently it is made from the calcareous skeletons of living creatures.
If we take the Chalk as a limestone, this was made in a warm shallow sea from the shells of microscopic plankton as they died and sank to the sea floor. However along with the calcareous shells, there were also shells of diatomic plankton which are made out of silicon dioxide (quartz).
After deposition as the chalk was compacted by the overlying sediments that were laid down on top of it and it became buried, the water it contained became heated and the skeletons of the silicious diatoms dissolved in the water and then were redeposited as layers of "Chert" or "Flint" in the Chalk.
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How can black chert be distinguished form black limestone?
If you have a small sample bottle of dilute hydrochloric acid, the limestone will fizz as it is calcium carbonate and will dissolve in the acid, releasing carbon dioxide gas. The same acid will not react with the inert silica of a black chert. Sometimes chert and limestone are finely inter-bedded and the acid will pick out the limestone bands!
What is organic limestone?
Rock that is made from cemented animal bones and shells is what organic limestone is.Specifically, the term "organic" indicates that the rock in question contains parts from a once-living animal. Hard parts such as bones and shells may cement together. The minerals - such as calcite - which make up these hard parts will form into limestone. In comparison, chert will form from the silica-based skeletons of microorganisms that die in such watery environments as lakes and oceans.
Is dolomitic limestone same as agricultural limestone or horticultural hydrated limestone?
dolomitic limestone is different from agricultural or hydrated limestone the difference is in the MgO content and hardness Dolomitic Limestone is harder than both and its MgO content is higher. The CaO is lower in Dolomitic limestone and High in the later.
What the streak of limestone?
limestone has a white streak.
Is marble the same as limestone?
Marble is made from limestone.
Where can you find chert?
It is not uncommon to find masses and layers of chert within deposits of limestone.
How can black chert be distinguished form black limestone?
If you have a small sample bottle of dilute hydrochloric acid, the limestone will fizz as it is calcium carbonate and will dissolve in the acid, releasing carbon dioxide gas. The same acid will not react with the inert silica of a black chert. Sometimes chert and limestone are finely inter-bedded and the acid will pick out the limestone bands!
What are three compositions of sedimentary rock?
limestone,chert,andsandstone.
What sedimentary rock forms inside of limestone?
One possible answer is that chert can form inside of limestone. Chert is a microcrystalline sedimentary rock that forms from the accumulation of silica-rich remains of marine organisms, such as diatoms or radiolarians. Another possibility is travertine, which is a type of limestone that forms from the precipitation of calcium carbonate from water, typically in caves or hot springs.
Very hard sedimentary rock that often forms inside limestone?
Chert.
What is a very hard sedimentary rock that often forms inside limestone?
chert
What is very hard sedimentary rock formed inside limestone called?
chert.
What kind of sedimentary rocks are crystalline limestone and chert classified as?
intrusive sedimentary
What is the name of a very hard sedimentary rock that often forms in limestone?
Chert, a form of quartz, can form as beds or nodules in limestone or dolostone.
What is a very hard rock that often is formed inside limestone?
Chert! Replacement chert, actually. Made of mostly silica, and has similar properties as quartz (hard, fractures).
What are some examples of a fine-grained rock?
Chert, mudstone, shale, slate, precipitated limestone.
What are some examples of a fine grained rock?
Chert, mudstone, shale, slate, precipitated limestone.
