Unlike alluvial gold, which is found as very small flakes on riverbanks, gold-bearing rocks have to be dug out of the ground. We're after pure gold, but rock that contains gold also includes lots ...

Name the parts of an alluvial fan, and discuss the sedimentary structures in ... Petrology of evaporites and chemical sedimentary rocks. We will look at hand specimens of coal, chert, ironstone and ...

sedimentary rocks will also be deposited within the rift valley. At first the rift valley will be dominated by river systems, including these environments: alluvial fans, river channels and ...