THEMIS daytime IR mosaic of Biblis Tholus.
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Biblis Tholus is an extinct Martian volcano located at Lua error in Module:Coordinates at line 668: callParserFunction: function "#coordinates" was not found., one of two volcanoes near the center of the Tharsis volcanism. Along with Ulysses Tholus, it is almost midway between Olympus Mons and the Tharsis Montes. It is approximately 170 kilometers (110 mi) long and 100 kilometers (62 mi) wide, rising about 3 kilometers (1.9 mi) from its surroundings.
In the middle of the volcano is a caldera, named Biblis Patera, believed to have formed as the result of collapse of the magma chamber during eruptions of the volcano. The caldera is 53 kilometers (33 mi) in diameter and four kilometers (2.5 miles) in depth.
Topography and location in Tharsis using MOLA data set.
Close-up of Biblis Patera taken with Mars Odyssey. Rim of crater shows multiple episodes of collapse.
Nearby Ulysses Tholus, showing its location in relation to other volcanoes (photo by THEMIS).
Biblis Patera pedestal crater, as seen by HiRISE.
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