Chapter 3 - Chapter 3 Introduction Pangaea- the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 3 Introduction Pangaea- the supercontinent suggested by Wegener that later fragmented into separate continents that then drifted apart, moving slowly to their present positions otherwise known as continental drift Sea floor spreading- the idea that continents drift apart because new ocean floor forms between them Subduction- process of ocean floor sinking into the mantle What was Wegener's evidence for continental drift? Fit of the continents: The continents joined like pieces of a jigsaw puzzle with few overlaps or gaps Locations of past glaciations: glaciers moving scrape sediment off the ground and carry it along. Glaciers eventually melt and the sediment collected create a distinctive layer of sediment called glacial till, a mixture of mud, sand, pebbles, and larger rocks. Studying the distribution of glacial till, the glaciers must have covered large areas of continents Distribution of equatorial climatic belts: Late Paleozoic sedimentary rock layer include abundant coal and the relicts of reefs. Subtropical regions on either side of the tropical belt contain deserts. Wegener thought that the distribution of late
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/01/2012 for the course GEOLOGY 100 taught by Professor Lepre during the Fall '11 term at Rutgers.

Page1 / 2

Chapter 3 - Chapter 3 Introduction Pangaea- the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online