CHAPTER III.
Chronological succession of the fossiliferous rocks--Tests or age
of strata--Value of Palaeontological evidence in stratigraphical
Geology--General sequence of the great formations.
CHAPTER IV.
The breaks in the palaeontological and geological record--Use of
the term "contemporaneous" as applied to groups of strata--General
sequence of strata and of life-forms interfered with by more or
less extensive gaps--Unconformability--Phenomena implied by
this--Causes of the imperfection of the palaeontological record.
CHAPTER V.
Conclusions to be drawn from fossils--Age of rocks--Mode of origin
of any fossiliferous bed--Fluviatile, lacustrine, and marine
deposits--Conclusions as to climate--Proofs of elevation and
subsidence of portions of the earth's crust derived from fossils.
CHAPTER VI.
The biological relations of fossils--Extinction of
life-forms--Geological range of different species--Persistent types
of life--Modern origin of existing animals and plants--Reference
of fossil forms to the existing primary divisions of the animal
kingdom--Departure of the older types of life from those now in
existence--Resemblance of the fossils of a given formation to
those of the formation next above and next below--Introduction
of new life-forms.
PART II.
HISTORICAL PALAEONTOLOGY.
CHAPTER VII.
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