grain size than either siltstones or claystones. Alternatively, some sources say it is a synonym for mudrock. A claystone is a mudrock which does not split...

siliciclastic sedimentary rocks. The types of mudrocks include: siltstone, claystone, mudstone, slate, and shale. Most of the particles are less than 0.0625 mm...

Clastic rock – composed of fragments, or clasts, of pre-existing rock. S Claystone – a sedimentary rock formed from clay S Coal – a sedimentary rock formed...

Badlands near Drumheller, Alberta. Erosion has exposed the claystone K/T boundary...

an outcrop of mainly Pliocene/Pleistocene sediments. It is composed of claystones, siltstones, and sandstones that preserve numerous fossils of land mammals...

The intermediate claystone layer contains 1000 times more iridium than the upper and lower layers. It is the boundary between Cretaceous and Tertiary...

The K/T boundary. The intermediate claystone layer contains 1000 times more iridium than the upper and lower layers. It is the boundary between Cretaceous...

Underlies Fort Union Formation Overlies Fox Hills Formation Lithology Primary Claystone, mudstone Other Sandstone Location Region Montana, North Dakota, South...

Clarno. Blue Basin near Sheep Rock is a volcanic ash bowl transformed into claystone by eons of erosion, colored pastel blue by minerals. Jurassic Utah 39°19′N...