Dorsa Harker
Encyclopedia
Dorsa Harker is a wrinkle ridge at in Mare Crisium
on the Moon
. It is 197 km long and was named after Alfred Harker
, an English
petrologist, in 1976.
Mare Crisium
Mare Crisium is a lunar mare located in the Moon's Crisium basin, just northeast of Mare Tranquillitatis. This basin is of the Pre-Imbrian period, 4.55 to 3.85 billion years ago. This mare is in diameter, and 176,000 km2 in area. It has a very flat floor, with a ring of wrinkled ridges...
on the Moon
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...
. It is 197 km long and was named after Alfred Harker
Alfred Harker (petrologist)
Alfred Harker FRS was an English geologist who specialised in petrology and interpretive petrography. He worked for the Geological Survey of Scotland and conducted extensive surveying and geological studies of western Scotland and the Isle of Skye...
, an English
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...
petrologist, in 1976.