The Beaverhead impact structure is the second-largest impact structure within the U.S. It lies within the states of Idaho and Montana. Estimated at 60 kilometers (37 mi) in diameter, it is …

The Beaverhead impact structure, which spans the border between Montana and Idaho, is the second largest known meteorite impact crater in the United States. The crater is exposed at …

Flying over the Beaverhead structure we note that there is no visible crater form. The structure, which extends across at least 100 km (but may be as wide as 150 km) has no circular outline. …

Beaverhead Crater | Idaho/Montana, U.S. 44°15′N 114°0′W At 37 miles ( 60 km ) in width, this crater is one of the largest impact craters on Earth. It spans the border of Idaho and Montana ...

The Beaverhead impact structure is the second-largest impact structure within the U.S. It lies within the states of Idaho and Montana. Estimated at 60 kilometers (37 mi) in diameter, it is …

Jan 1, 2003 · New 40Ar/39Ar and uranium-lead (U-Pb) zircon data from the Beaverhead impact structure, first identified by extensive shatter coning of Proterozoic quartzite and gneiss from …

BEAVERHEAD – LAKE MISSOULA. by: Charles O’Dale. North of the Beaverhead impact structure is the remnant of Glacial Lake Missoula. Millions of years after the Beaverhead …

Jun 26, 2019 · The Beaverhead impact structure is located in USA on the border between Montana and Idaho. The crater is extremely eroded due to its age: U-Pb and 40 Ar/ 39 Ar …

The Beaverhead Impact Structure - Discovery and Investigation of an Allocthonous Impact Structure in SW Montana, 2003. Glikson, A. Y., Mega-impacts and mantle-melting episodes: …

Jul 21, 2007 · Beaverhead Crater is one of the eight largest impact craters on Earth, and possibly the largest in the United States. Its age is estimated to be about 850 to 900 million years. …