Simple Lithology

carbonate rich mudstone

alt label
marlstone more like this
definition Mudstone that contains between 10 and 50 percent carbonate minerals in the mud size fraction. Carbonate origin is not specified. more like this
example calcareous loess more like this
note Carbonate-rich mudstone' definition limits carbonate to mud-size fraction to avoid overlap with 'impure carbonate sedimentary rock'. If carbonate minerals are in sand or gravel size fractions, use 'impure carbonate sedimentary rock'. The operational test typically used to identify this category is if the rock fizzes when hydrochloric acid is applied. The '10 percent carbonate' criteria is a fuzzy boundary. more like this
source This vocabulary more like this
broader generic mudstone
narrower carbonate rich mudstone
in scheme simplelithology
is primary topic of carbonate rich mudstone