they originate from Africa
mud cones formed by pellets of mud
Molds formed on the surface of mud or clay, then, rarely are fossilized, because they are likely to erode more quickly than the mud or clay in which they were formed can harden.
Mud came first, as it is the raw material from which shale is formed. Shale is a sedimentary rock that forms from compacted and hardened mud over time due to pressure and heat.
It is made by mud and dead plants. They then dry.
Sedimentary rock. Sedimentary rocks are formed from sediments such as mud, sand, or clay that have been compressed over time. Examples include shale, sandstone, and mudstone.
sedimentary Rock formed from a rapid, subaqueous sand or mud flow.
away
Delta
A Delta is formed
shale
Delta
it is called SHALE :)