Midnight Volcano is believed to be a buried extinct volcano in southern Humphreys County, Mississippi. It is named after the nearby town of Midnight, Mississippi. During the time it was active, Midnight Volcano may have been a volcanic island in the Mississippi Embayment. [1]
The volcanic activity in the area is associated with the Monroe Uplift, [2] [3] and igneous rocks in the region have been dated from 84 to 73 Ma. [4] A well drilled in Humphreys County found around 600 m (2000 ft) of volcanic rock, starting 1110 m (3641 ft) below the surface at the shallowest. [5] The most recent measured volcanic rock was dated to 66 Ma, [6] while older (and deeper) samples were dated at 81 and 94 Ma. [7]
These most recent deposits roughly coincide with the activity of Jackson Volcano, another buried volcano southeast of Midnight [8]
Volcanic debris from this volcanism was also found in the "Coffee sands", a Cretaceous sand layer to the north. [2]
33°02′57″N 90°34′25″W / 33.049040°N 90.573494°W
Midnight Volcano is believed to be a buried extinct volcano in southern Humphreys County, Mississippi. It is named after the nearby town of Midnight, Mississippi. During the time it was active, Midnight Volcano may have been a volcanic island in the Mississippi Embayment. [1]
The volcanic activity in the area is associated with the Monroe Uplift, [2] [3] and igneous rocks in the region have been dated from 84 to 73 Ma. [4] A well drilled in Humphreys County found around 600 m (2000 ft) of volcanic rock, starting 1110 m (3641 ft) below the surface at the shallowest. [5] The most recent measured volcanic rock was dated to 66 Ma, [6] while older (and deeper) samples were dated at 81 and 94 Ma. [7]
These most recent deposits roughly coincide with the activity of Jackson Volcano, another buried volcano southeast of Midnight [8]
Volcanic debris from this volcanism was also found in the "Coffee sands", a Cretaceous sand layer to the north. [2]
33°02′57″N 90°34′25″W / 33.049040°N 90.573494°W