Answer: Geology is the study of the earth. Biology is the study of life. The two are inextricably interlinked. Recent work has shown that life formed extremely quickly on this planet and that since it formed it has shaped the environment in very profound ways. For example early life generated our oxygen rich atmosphere.
There are specific subdiciplines of geology that are heavily oriented towards biology. These include paleontology, paleobotany and paleoecology.
There are a number of rocks that are created predominantly by biological processes. Limestone is the principle example. Life also created our planet's coal and petroleum resources. These resources exist because life was so abundant that the environment's ability to 'eat' the surplus was outstripped.
||DONT USE IN EXACT WORDS...I ADVISE YOU NOT TO..PLAGARISM MAY BE DETECTED...YOU MAY LOOSE POINTS FOR THIS REASON.||