The Cretaceous World

The Cretaceous World - Greenland and into northern Europe....

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

View Full Document Right Arrow Icon
The Cretaceous World The breakup of Pangaea continued during the Cretaceous, with the Atlantic Ocean finally opening completely by the late Cretaceous. The westward movement of North and South America led to massive mountain building episodes that produced parts of the Rocky Mountains in the north and the Andes Mountains in the south. During much of the Cretaceous, North America was split into two separate land areas by the north- south tending seaway. This led to the development of two distinct paleofloristic regions: the Aquilapollenites province in the west and the normapolles province in the east. The Aquilapollenites province extended northward through Alaska and Siberia and then southward into eastern Asia. The normapolles province passed through
Background image of page 1

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

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

Unformatted text preview: Greenland and into northern Europe. With the drop in sea-levels at the end of the Cretaceous plants and animals were able to migrate between these (and other) regions. India, which had separated from the rest of the former Gondwana earlier, remained an island throughout the Cretaceous and into the Tertiary period. The Cretaceous seems to have been a time period during which the climates were quite equitable. There is no evidence of glaciation during this time. Palm trees in fact have been found in Cretaceous sediments as far north as Alaska, and numerous plants with tropical affinities today were common throughout the Aquilapollenites province. Near the end of the Cretaceous a slight global cooling began....
View Full Document

Page1 / 2

The Cretaceous World - Greenland and into northern Europe....

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