Adel Mountains Volcanic Field
Volcanic field in Montana, United States / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Adel Mountains Volcanic Field?
Summarize this article for a 10 year old
The Adel Mountains Volcanic Field (also known as the Adel Mountains, Adel Volcanics, and Adel Mountain Volcanics) is an ancient volcanic field of heavily eroded 75-million-year-old[1][2][3] igneous rocks about 40 miles long and 20 miles wide (800 square miles, or 2,071 square kilometers)[1][4][5] in west-central Montana about 30 miles southwest of the city of Great Falls. The area was named by geologist John Bartholomew Lyons,[6] who first described the general geology of the region in 1944.[7] The Adel Mountains Volcanic Field is a significant and abundant source of shonkinite, a very uncommon type of intrusive igneous rock found primarily in Montana, Ontario, and Timor.[1][2][8][9] Because of its geologic structure, the Adel Mountains Volcanic Field has drawn the attention of geologists for more than 100 years.[10]