i hate the feeling of chalk.
[{"role": "system", "content": "Chalk () is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite. Calcite is an ionic salt called calcium carbonate or CaCO. It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite shells (coccoliths) shed from micro-organisms called coccolithophores. Flint (a type of chert) is very common as bands parallel to the bedding or as nodules embedded in chalk. It is probably derived from sponge spicules or other siliceous organisms as water is expelled upwards during compaction. Flint is often deposited around larger fossils such as Echinoidea which may be silicified (i.e. replaced molecule by molecule by flint). Chalk as seen in Cretaceous deposits of Western Europe is unusual among sedimentary limestones in the thickness of the beds. Most cliffs of chalk have very few obvious bedding planes unlike most thick sequences of limestone such as the Carboniferous Limestone or the Jurassic oolitic limestones. This presumably indicates very stable conditions over tens of millions of years. Chalk has greater resistance to weathering and slumping than the clays with which it is usually associated, thus forming tall steep cliffs where chalk ridges meet the sea.\n"}, {"role": "assistant", "content": "chalk is a white soft material"}, {"role": "user", "content": "I remember having to use that instead of dry erase markers."}, {"role": "assistant", "content": "chalk is a form of limestone"}, {"role": "user", "content": "I had no idea, I thought limestone was totally different."}, {"role": "assistant", "content": "chalk is a mineral form of calcite"}, {"role": "user", "content": "I don't really know what calcite is apart from the fact that it is a mineral."}, {"role": "assistant", "content": "its a white for of mineral calcite which is similar to calcium"}, {"role": "user", "content": "Hmm so like our bones then? Must be a lot softer than that though."}]