EESA01H3 Lecture Notes - Lecture 10: Cascadia Subduction Zone, Alleghanian Orogeny, Avalon Peninsula
Document Summary
Shield was covered with limestone in southern ontario. Gneiss is the most common rock type in northern ontario. Appalachian orogeny closure of aptos ocean and formation of pangea. Orogen: all the rocks that result from an orogeny. Sedimentary rocks that are younger than 600 million years limestones. First ore in ontario was found in 1858 was found in petrolia. Niagara escarpment is migrating everyday towards the dip. Pangea breaks up, the atlantic ocean opens and the west becomes the active plate margin british columbia and alaska added as north america moves west. Mountains are a result of adding terrains to western north america. Western canada sedimentary basin: canada"s principle oil and gas deposits. Last 2. 5 million year the ice has been covering the northern hemisphere for around 50 times. We live in the interglacial period called the. Much of the ice in ontario came from quebec. Wisconsin glaciation that is the last ice age.
