- stratigraphy,
called the law of superposition, states: in an
undeformed stratigraphic sequence, the
oldest strata occur at the base of the sequence. Chemostratigraphy...
- Cryogenian,
arbitrary numeric boundary definitions (Global
Standard Stratigraphic Ages, GSSAs) are used to
divide geologic time.
Proposals have been made...
-
International Stratigraphic Commission, is a
daughter or
major subcommittee grade scientific organization that
concerns itself with
stratigraphical, geological...
-
position in the
layers of rock
exposed in a
geographical region (the
stratigraphic column). It is the
fundamental unit of lithostratigraphy, the study...
- A
stratigraphic unit is a
volume of rock of
identifiable origin and
relative age
range that is
defined by the
distinctive and dominant,
easily mapped...
-
geological epochs are
divided into ages.
Stages are
divided into
smaller stratigraphic units called chronozones or substages, and
added together into superstages...
-
surfaces or
bedding planes.
Prior to the
publication of the
International Stratigraphic Guide,
older publications have
defined a
stratum as
being either equivalent...
-
North American Commission on
Stratigraphic Nomenclature 2005, pp. 1569–1570.
North American Commission on
Stratigraphic Nomenclature 2005, pp. 1569. Harshbarger...
- the
Appalachian Basin. It
dates back to the
Devonian period. Also
stratigraphically equivalent to the
Portage Group. The West
Falls Group is a geologic...
- work, however, was the
realisation that
sites had to be
excavated stratigraphically, in the
reverse order to that in
which they were created, without...
