Southern Oregon Universtity Geology 103 Field Trip

🔖 Science 
On Wednesday Dr. Elliot's geology 103 class went for a field trip. The main focus was on gathering fossil specimens from various locations. The fossils were all found in the Hornbrook formation, contained within Osberger Gulch Sandstone. The rocks were formed during the Cretaceous, which gives them and the fossils an age of approximately 95,000,000 years. The interpretation is that the sediments were deposited from a beach or shallow marine environment. The abundance of the shells and the broken state of them suggests a high energy environment, so waves must have been present. By far the most common fossils (and original hard parts) were clams and mussels, but gastropods were also present. One lucky student even found a shrimp. Dr. elliot and 2 students Dr. Elliot and 2 other students climbing a tilted bed of sandstone on the side of Interstate 5, just south of Ashland. nice specimin A nice collection taken inches away from a fault that dampened and softened the surrounding sandstone making it easier to collect taking notes Identifying Fossils scorpion One of the many local scorpions we found. We didn't kill it in hopes that it would die in a depositional environment somewhere and make a nice fossil. removing a fossil Trying to remove a fossil from the sandstone. relic Relic of time.