1. Pollen Analysis-Palynology
a. Provides a record of past vegetation changes that may be due to climatic changes.
a.i. Provides a record from the land to compare to the marine and ice records.
a.ii. Not all vegetation changes occurs b/c of climate change
1. Lake Sediments
a. Accumulation rates usually high and made up of basically either material made
inside the lake or are carried into the lake.
b. Pollen is most widely studied component of lake sediments
c. Biological productivity in lakes is, in part c
ENST 445 midterm 1
Bradley Chps 2, 5, 6, 7, 9, 10
Cronin Chp 2, 3, 4
Imbrie & Imbrie parts I & II
DISCUSSION IMBRIE & IMBRIE
Who is Louis Agassiz and what were his contributions to the ice age theory?
Was Agassiz the only person at the time who beli
1. Ice Cores:
a. Provides a unique record of precipitation amounts, air temperature, atmospheric
composition, the explosions of volcanic eruptions, and even solar radiation.
b. Four main ways of analyzing the data in ice cores:
b.i. Isotopic composition o
a. Can use tree rings to date and as proxies to indicate climate change.
b. Lighter and darker bands are seasonal growth increments that occur almost
b.i. Early wood (thin walled cells) and late-wood( densely packed)
a. Reef-building corals are generally formed above 20 degrees Celsius and mostly
found between latitudes 30 degs N and 30 degs S. the tropical regions.
a.i. Below 20 degs, calcification significantly decreases (skeletal structure
growth) and th