- The
Imbrian is a
lunar geologic period divided into two epochs, the
Early and Late. In the
lunar geologic timescale, the
Early Imbrian epoch occurred from...
- into five
generally recognized periods: the Copernican, Eratosthenian,
Imbrian (Late and
Early epochs), Nectarian, and Pre-Nectarian. The
boundaries of...
-
intermediate to
young age
group of the
Upper Imbrian epoch. The
surrounding mountains are
thought to be of the
Lower Imbrian epoch, but the
actual basin is probably...
-
period ended with the
formation of the
Imbrium basin,
which initiated the
Imbrian Period.
Magnetic anomalies found in some
Nectarian Period basins suggest...
- the
prominent lunar maria. Most of the mare
basalts erupted during the
Imbrian period, 3.3–3.7 billion
years ago,
though some are as
young as 1.2 billion...
-
geologic systems/periods (Pre-Nectarian, Nectarian,
Imbrian, Eratosthenian, Copernican), with the
Imbrian divided into two series/epochs (Early and Late)...
- also does not
possess a ray system. The m****ive
basaltic volcanism of the
Imbrian period tapered off and
ceased during this long span of
lunar time. The...
-
diameter and 1,500
metres (4,900 ft) in depth. It may be from the Pre-
Imbrian period,
which lasted from 4.55 to 3.85
billion years ago. It is
named for...
-
mainly of the
Nectarian period and the
Lower Imbrian epoch, with the mare
material of the
Upper Imbrian epoch. The
crater Theophilus on the northeastern...
-
crater Hyginus. The
lunar material surrounding the mare is from the
Lower Imbrian epoch, and the mare
material is from the
Eratosthenian epoch.[citation...
