Stratigraphy is that branch of geology which studies rock layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy and t
Our world is made of rock. Those who live in a landscape where rock outcrops are obvious will have wondered about the kind of rock they are looking at and how they came to be where they are now. Graha
Metamorphic rocks are the third great type of rock found in the lithosphere. Originally of other types these rocks have been changed mainly by heat and pressure into new forms. This introductory guide
One of the most important issues in current debates on climate change is sea level rise. Hardly a day goes by when there is not a newspaper article, TV or radio presentation on the topic. Nearly half
