12.114 | Fall 2005 | Undergraduate

Field Geology I

Lecture 6 Image Gallery

lec3photo16.jpg

Description:

This next image portrays the timing of different depositional events around the time of the Antler Orogeny. You can see that the Arc Volcanism continued throughout the time that the Antler was created. You can also see that the sediment found in the Antler Allochthon were experiencing active deposition until ~360ma. The filling of the foredeep then starts ~355ma, suggesting that the material had been thrust over the sinking continental margin. By ~350ma, we find sediments overlapping the Antler Orogeny, suggesting that it had been significantly eroded. The dates in this figure are old, and though we do not need to know the exact numbers right now, it is important to think about the different forms of geologic evidence available for constraining when certain events happened. Note that deposition continues in the Havallah basin east of the arc and west of the developing Antler Mountain belt. This suggests there was no arc collision during Antler time. Image courtesy of Professor Burchfiel.

Alt text:
Antler orogeny event timeline.
Caption:
This next image portrays the timing of different depositional events around the time of the Antler Orogeny. You can see that the Arc Volcanism continued throughout the time that the Antler was created. You can also see that the sediment found in the Antler Allochthon were experiencing active deposition until ~360ma. The filling of the foredeep then starts ~355ma, suggesting that the material had been thrust over the sinking continental margin. By ~350ma, we find sediments overlapping the Antler Orogeny, suggesting that it had been significantly eroded. The dates in this figure are old, and though we do not need to know the exact numbers right now, it is important to think about the different forms of geologic evidence available for constraining when certain events happened. Note that deposition continues in the Havallah basin east of the arc and west of the developing Antler Mountain belt. This suggests there was no arc collision during Antler time.
Credit:
Image courtesy of Professor Burchfiel.
Antler orogeny event timeline.

Course Info

Learning Resource Types
Image Gallery
Activity Assignments