- Carboniferous) is a
subperiod in the
geologic timescale or a
subsystem of the
geologic record. It is the
earlier of two
subperiods of the Carboniferous...
- Carboniferous) is, on the ICS
geologic timescale, the
younger of two
subperiods (or
upper of two subsystems) of the
Carboniferous Period. It
lasted from...
-
mammals and
their extinct relatives,
originated during the
Pennsylvanian subperiod (~323 million to ~300 million
years ago), when they
split from the reptile...
-
subperiods, the
return or the
holding period return over the
overall period can be
calculated by
combining the
returns within each of the
subperiods....
-
margin existed until Laurasia and
Gondwana collided in the
Pennsylvanian subperiod to form Pangea.
Pangea began to
break up in the Tri****ic, but seafloor...
-
relatively short reign of
William IV,
which ended with his
death in 1837. The
subperiod that is the
Regency era is
defined by the
regency of
George IV as Prince...
-
different regions.
Archaeologists divide the Pre-Pottery
Neolithic into two
subperiods: the Pre-Pottery
Neolithic A (PPNA, c. 9600–8800 BCE) and the Pre-Pottery...
-
Carboniferous 358.9 Ma – in
North America, at the
beginning of the
Mississippian subperiod of the Carboniferous. In 19th-century
texts the
Devonian has been called...
- and
shales in the rock
columns of the
Mississippian and
Pennsylvanian subperiods. Thereafter, ****her
downstream as it
traverses the area
known as The...
- ****as, the Gr**** name for Greece. This
period is
divided into
three subperiods: The
Early ****adic (EH)
period (c. 3200–2000 BC) was a time of prosperity...
