Chert pebble conglomerate
Chert breccia

Chert pebble conglomerate

Biogenous and lithogenous sedimentary rock.
Multi-colored chert fragments of a possible ancient stream or shoreline gravel deposit are tightly cemented together with silica cement.
Morrison Formation, Jurassic age, Henry Mountains, Garfield County, Utah.
https://gotbooks.miracosta.edu/rocks/sedimentary/4.html 2/2/2021