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Location of Washington County in Pennsylvania. This is a list of the National Register of Historic Places listings in Washington County, Pennsylvania. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Washington County, Pennsylvania, United States. The locations of National ...
Lake Turkana (/ t ɜːr ˈ k ɑː n ə,-ˈ k æ n-/) is a saline lake in the Kenyan Rift Valley, in northern Kenya, with its far northern end crossing into Ethiopia. [2] It is the world's largest permanent desert lake and the world's largest alkaline lake.
It would take 150 million years for the mountains of this area to achieve the shapes seen today. These mountains are steep-sided and valleys are canoe-shaped, largely due to the area's complex folded structure. Most of the coal being mined from this section is from the Pennsylvanian-aged formations.
→ Elaborate 600-year-old castle — complete with moat — unearthed in France. Take a look Take a look → Mysterious wooden train car — almost 100 years old — unearthed in Belgium, photos show
A well-known crater lake, which bears the same name as the geological feature, is Crater Lake in Oregon. It is located in the caldera of Mount Mazama . It is the deepest lake in the United States with a depth of 594 m (1,949 ft).
The diameter of the original crater is uncertain, but has been estimated to be from 30 to 70 km (19 to 43 mi). [2] Computer simulations of a 7 km (4.3 mi) in diameter impactor crashing into a 2 km (1.2 mi) thick ice sheet covering granite bedrock produced a crater of final diameter compatible with the Yarrabubba crater.
The Chesapeake Bay impact crater is a buried impact crater, located beneath the mouth of Chesapeake Bay, United States. It was formed by a bolide that struck the eastern shore of North America about 35.5 ± 0.3 million years ago, in the late Eocene epoch. It is one of the best-preserved "wet-target" impact craters in the world. [3]
The Manson impact structure is an impact structure near the site of Manson, Iowa where an asteroid or comet nucleus struck the Earth during the Cretaceous Period, approximately 74 Ma. [1]