Uranius Tholus is a volcano on Mars located in the Tharsis quadrangle

Tharsis quadrangle

The Tharsis quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey Astrogeology Research Program. The Tharsis quadrangle is also referred to as MC-9 ....

 at 2.9° north latitude and 121.6° west longitude. It is 101.7 km across and was named after a classical albedo feature name.

Volcanoes

Tharsis is a land of great volcanoes. Olympus is the tallest known volcano. Mons is a term used for a large raised feature. Tholus is about the same, but smaller. A patera is flatter and like a volcano with a super large opening. Actually, a patera was probably formed when the top of a volcano collapsed because its magma chamber was empty. Crater Lake

Crater Lake

Crater Lake is a caldera lake located in the south-central region of the U.S. state of Oregon. It is the main feature of Crater Lake National Park and famous for its deep blue color and water clarity. The lake partly fills a nearly deep caldera that was formed around 7,700 years agoby the...

Oregon was formed that way.