Fossiliferous limestone
Rock
Also called Shelly limestone and Crinoidal limestone
About it
Limestone packed with visible fossils such as brachiopods, crinoid stems, corals, or bryozoans in a calcite matrix. Common in Ordovician to Carboniferous beds of Ontario, Ohio, Indiana, and Kentucky.
- Type
- Rock (sedimentary)
- Group
- Sedimentary (biochemical)
- Hardness (Mohs)
- 3–4
- Lustre
- dull
- Colours
- grey, tan, cream, brown
- Transparency
- opaque
Typical values: real specimens vary. For more, see mindat.org.