1. The Highlands of Venus
The mapping of Venus has shown two large elevated areas
which have been named Ishtar Terra and Aphrodite Terra
(If Venus is the Roman goddess of love, then Ishtar and
Aphrodite are the Babylonian and Greek counterparts.).
Although there is no ocean, these highlands are continent-
sized elevated masses. These "continents" make up only 8%
of the planet's surface compared to 25% for Earth's planets.
The remainder of the surface is relatively smooth with little
geological differentiation, but is classified as lowlands (25%)
and rolling plains(65%). Continents on the Earth are
associated with the boundaries of tectonic plates, there
appears to be no large scale plate tectonics on Venus.
Ishtar Terra is in the southern high latitudes and is about the
size of Australia. Prominent on Ishtar Terra is a great plateau
called Lakshmi Planum which is about 1500 km across at its
widest point. There are mountain ranges surrounding this
plateau which contain Maxwell's Mont, the highest mountain
peak on the planet. The peak of Maxwell's Mont is some 14
km higher than the lowest point on the planet, compared to
about 20 km between the peak of Mt. Everest and the deepest
point in Earth's oceans, Challenger Deep in the Marianas
Trench on the eastern edge of the Phillipines plate.
Aphrodite Terra is on the planet's equator and is comparable
in size to Africa.