Dinorwic is a Martian

Mars

Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

 impact crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

, approximately 56 kilometers in diameter. It is located on the planet

Planet

A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...

 Mars

Mars

Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

 at 30.4°S, 101.6°W, northeast of the crater Virrat

Virrat (crater)

Virrat is a Martian impact crater, approximately 54 kilometres in diameter. It is located at 31.1°S, 103°W, southwest of the crater Dinorwic and northeast of Clantas Fossae. Several Virrat crater radii to the north are the craters Koga and Nhill. It is named after a town in [Finland]], and its name...

 and north of the crater Tugaske

Tugaske (crater)

Tugaske is a Martian impact crater, approximately 31 kilometres in diameter. It is located at 32.1°S, 101.2°W, south of the crater Dinorwic and southeast of the crater Virrat. It is named after a town in Saskatchewan, Canada, and its name was approved by the International Astronomical Union in 1991...

. To the northeast of Dinorwic is the crater Caxias

Caxias (crater)

Caxias is a Martian impact crater, approximately 25 kilometers in diameter. It is located at 29.3°S, 100.8°W, southeast of the crater Llanesco and northeast of the crater Dinorwic. It was named after Duque de Caxias, a town in Brazil, and its name was adopted by the International Astronomical Union...

, and farther north is the crater Llanesco

Llanesco (crater)

Llanesco is a Martian impact crater, 27 kilometers in diameter. It is located at 28.5S, 101.2°W, north of the crater Dinorwic. It is named after a town in Spain, and its name was approved by the International Astronomical Union in 1991...

. It is named after the town

Dinorwic, Ontario

Dinorwic is an unincorporated settlement in northwestern Ontario, Canada. It is situated on Highway 17 at the junction of Highway 72.The nearest major community is Dryden, where hospital service is provided....

 in Ontario

Ontario

Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

. Its name was approved by the International Astronomical Union

International Astronomical Union

The International Astronomical Union IAU is a collection of professional astronomers, at the Ph.D. level and beyond, active in professional research and education in astronomy...

 in 1991. According to a surface age map of Mars based on US Geological Survey data, the area around Dinorwic is from the Noachian epoch, which places the area's age at 3.8 to 3.5 billion years ago. At the crater's rim, it is about 7,600 meters above zero altitude, and it is about 5,950 meters above zero altitude at its floor, giving it a depth of 1.6 kilometers.