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The first stage in the formation of a sedimentary rock is the deposition of sediment. The size, shape and type of sediment can tell you lots about the depositional environment.

In a high energy env...

Organic material accumulates in an area of fast plant growth and anaerobic conditons (which stops the vegetation decaying), such as a tropical delta, the organic material is buried which leads to increase...

For a hydrocarbon (oil or gas) accumulation to form a source rock, reservoir rock and cap/seal rock are required. A trapping mechanism is also essential and this can be structural or stratigraphic. A sour...

Both species are part of the same phyla, Echinodermata. They both live in marine environments, have the same feeding system, hasve ambulacra and tube feet, which they use for respiration.  However, there ...

Ophiolites always follow a particular sequence and composition, the first layer is comprised of deep sea pelagic sediments (often red clays or greywackes) beneath this layer is a layer of Basaltic Pillow ...