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What is calcarenite?
A calcarenite is a form of limestone composed of sand-sized grains derived from the erosion of other rocks.
What is a biocalcarenite?
A biocalcarenite is a calcarenite which contains fossils.
How would you distinguish a sample of calcarenite from a sample of mudstone with fossil shells?
Calcarenite has sandsized shell fragments and sometimes a few larger whole fossil shells. Mudstone is mostly comprised of silt or clay and may or maynot contain fossils, the mudstone will break, fissil, or crumble.
How do you distinguish a sample of a calcarenite fossiliferous limestone from a sample of carbonite mudstone with fossil shells?
One way to distinguish between the samples is to examine the grain size and texture: calcarenite fossiliferous limestone typically has larger grains and a coarser texture compared to the finer grains and smoother texture of carbonite mudstone with fossil shells. Additionally, conducting a chemical test such as a reaction with acid can help differentiate between the two types of rock, since limestone will fizz when it comes in contact with acid due to its calcium carbonate content.
