- In
stratigraphy and geology, an
eonothem is the
totality of rock
strata laid down in the
stratigraphic record deposited during a
certain eon of the continuous...
-
representative of a
specific interval of
geologic time, and only this time span.
Eonothem, erathem, system, series, subseries, stage, and
substage are the hierarchical...
- time, from the
shortest time span
stage to the
largest thickest strata eonothem and time
spans eon.
Concurrent work in
other natural science fields required...
- The
Phanerozoic eonothem can thus be
divided into Cenozoic, Mesozoic, and
Paleozoic erathems. Similarly, the
Proterozoic eonothem is
divided youngest...
- literature. The
geological timescale has all
systems in the
Phanerozoic eonothem subdivided into series. Some of
these have
their own names, in
other cases...
- used ICS Time
Scale Definition Chronological unit Eon
Stratigraphic unit
Eonothem Time span
formality Formal Lower boundary definition Ten
oldest U-Pb zircon...
-
usage Global (ICS)
Definition Chronological unit Eon
Stratigraphic unit
Eonothem First proposed by
Preston Cloud, 1972 Time span
formality Formal Lower...
- used ICS Time
Scale Definition Chronological unit Eon
Stratigraphic unit
Eonothem Time span
formality Formal Lower boundary definition Defined Chronometrically...
-
chronostratigraphy Time
spans in
geochronology Notes to
geochronological units Eonothem Eon 4 total, half a
billion years or more
Erathem Era 10 defined, several...
-
chronostratigraphy Time
spans in
geochronology Notes to
geochronological units Eonothem Eon 4 total, half a
billion years or more
Erathem Era 10 defined, several...
