The characteristics of the rocks that hold fossils can be as informative as the fossils themselves. There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all ...

We have discovered the oldest meteorite impact crater on Earth, in the very heart of the Pilbara region of Western Australia. The crater formed more than 3.5 billion years ago, making it the ...

The study shows that the petrographic, geochemical and spectroscopic features in the graphite (the crystalline form of carbon) found in the Saglek-Hebron chemical sedimentary rocks are in fact ...

List common features and deposits of an alluvial fan, including grain size patterns (longitudinal and vertical). Name the parts of an alluvial fan, and discuss the sedimentary structures in each.

It often contains fossils and it reacts with acid giving off a gas. These features classify limestone as a sedimentary rock. Granite is a very hard rock made from large crystals. It does not react ...

A team of Chinese and foreign scientists has discovered underground sedimentary layers on Mars that appear to have been ...