Sedimentary rock radiometric dating


Sedimentary rocks can be categorized into three groups based on sediment type. Most sedimentary rocks are formed by the lithification of weathered rock debris that has been physically transported and deposited. During the transport process, the particles that make up these rocks often become rounded due to abrasion or can become highly sorted. Examples of this type of sedimentary rock include conglomerate and sandstone . Scientists sometimes call this general group of sedimentary rocks clastic . The remaining types of sedimentary rocks are created either from chemical precipitation and crystallization, or by the lithification of once living organic matter . We identify these sedimentary rocks as being non-clastic .

As sediment deposition builds up, the overburden (or 'lithostatic') pressure squeezes the sediment into layered solids in a process known as lithification ('rock formation') and the original connate fluids are expelled.


Sedimentary rock radiometric dating

Sedimentary rock radiometric dating