GEOLOGICAL CHRONOLOGY--REMARKS ON THE SUCCESSION OF
ORGANIC LIFE.
Summary of the History of Stratified Rocks--Striking Characteristics
of certain Formations--Human Remains found only in
superficial Deposits--Gradual Transition from the Organic Life
of one Period to that of the next--Evidence in favor of this
Opinion--Advance from Lower to Higher Types of Organic
Life as we ascend from the Older to the more Recent Formations
--Economic Value of Geological Chronology--Illustration--Search
for Coal--the Practical Man at Fault--the Geologist
comes to his aid, and saves him from useless Expense, 217