Simple Lithology

generic mudstone

http://resource.geosciml.org/classifier/cgi/lithology/generic_mudstone

definition Sedimentary rock consisting of less than 30 percent gravel-size (2 mm) particles and with a mud to sand ratio greater than 1. Clasts may be of any composition or origin. more like this
example argillite more like this
narrower carbonate mudstone
broader generic mudstone
carbonate rich mudstone
broader generic mudstone
clastic mudstone
broader generic mudstone
organic bearing mudstone
broader generic mudstone
pure carbonate mudstone
broader generic mudstone
silicate mudstone
broader generic mudstone
note Distinction of intrabasinal, diagenetic, or clastic genesis for very fine-grained carbonate minerals is so interpretive that it is proposed to not define the mudstone category based on intrabasinal vs epiclastic distinction required for clastic sedimentary rock-carbonate sedimentary rock categorization in this system. Schnurrenberger, D., Russell, J. and Kelts, K., 2003, Classification of lacustrine sediments based on sedimentary components: Journal of Paleolimnology, v.29, p141-154. more like this
source Pettijohn et al. 1987 referenced in Hallsworth and Knox 1999; extrapolated from Folk, 1954, Figure 1a; particle sizes defined from Krumbein phi scale (W C Krumbein and L L Sloss, Stratigraphy and Sedimentation, 2nd edition, Freeman, San Francisco, 1963; Krumbein and Pettijohn, 1938, Manual of Sedimentary Petrography: New York, Appleton Century Co., Inc.) more like this
type
Resource
Concept
broader sedimentary rock
narrower generic mudstone
in scheme simplelithology
is primary topic of generic mudstone