San Juan volcanic field
Volcanic field in southwestern Colorado, 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 San Juan volcanic field?
Summarize this article for a 10 year old
The San Juan volcanic field is part of the San Juan Mountains in southwestern Colorado. It consists mainly of volcanic rocks that form the largest remnant of a major composite volcanic field that covered most of the southern Rocky Mountains in the Middle Tertiary geologic time.[1] There are approximately fifteen calderas known in the San Juan Volcanic Fields; however, it is possible that there are two or even three more in the region.[1]
San Juan volcanic field | |
---|---|
Highest point | |
Coordinates | 37°53′36″N 106°46′28″W |
Geography | |
Location | Colorado, United States |
Geology | |
Mountain type | Volcanic field |
The region began with many composite volcanoes that became active between 35 and 40 million years ago, with peak activity in the time period around 35-30 million years ago.[1] Around this time the activity began to include explosive ash-flow eruptions.[2] Many of these volcanoes experienced caldera collapse, resulting in the fifteen to eighteen caldera volcanoes in the region today.[1]