👉 In geology, a term that describes rocks with an unusual chemical composition is "psilotaceous." This term refers to rocks that have a high percentage of calcium carbonate (CaCO3) in their mineralogy. They are often found in areas where there is little or no volcanic activity and are considered to be part of the Early Cretaceous period, which spanned from 201 million years ago to around 65 million years ago. The term "psilotaceous" was
