Geoscience Reference
In-Depth Information
in
c
re
a
s
in
g
m
a
tr
ix
(
m
u
d
,
s
il
t,
s
a
n
d
c
o
n
te
n
t)
5
0
2
0
5
0
Where the conglomerates are represented
by single clast types then:
m
= monomict (one type)
o
= oligomict (few types)
p
= polymict (many types)
Figure A6.13
Classifi cation of coarse-grained sedimentary rocks (conglomerates, breccias, etc.). Modifi ed
after Boggs 1992, Nichols 1999 and Stow 2005. In addition the following terms can be applied:
intraformational conglomerate and breccia, composed of clasts of the same material as the matrix;
extraformational conglomerate, composed of a mixture of rock types; clast-supported (or orthoconglomerate);
matrix-supported (or paraconglomerate or diamictite).
