Thanks to a variety of weathering and erosive processes, rocks can come in all shapes and sizes. The above rock from the McDowell Mountains near Phoenix, AZ has a peculiar shape similar to that of a mushroom! This rock is an example of a tor--an exposed mass of rock that abruptly rises above the surrounding ground… Continue reading How do you form a mushroom rock?
An unconformity is an erosional or non-depositional gap in the geologic record. They typically form when an older layer is subject to a period of erosion before the deposition of new sediments. This road cut near Payson, Arizona shows a pretty cool unconformity. Can you find where it is? Check the jump below to see… Continue reading Can you find the unconformity?
Ever wondered why the rocks of Sedona are so vibrantly red? I made this video for Arizona State University’s Science Showcase competition, I’d greatly appreciate anyone who can view/share! Plus learning about geology is fun! (Source: https://www.youtube.com/)
A few months ago, I made a blog post about The Geology of Disneyland. I’ve now turned that content into a video, so please do watch and enjoy! (Source: https://www.youtube.com/)
Unconformities—erosional or non-depositional gaps—are abound in the geologic record. These erosional surfaces separate a lower, older strata from a younger, upper one (unless the sequence has been overturned). An unconfomity will typically form when an older layer is subject to a period of erosion before the deposition of new sediments. For example, the “Great Unconformity” of… Continue reading Types of unconformities
Just by quickly looking at this harshly eroded landscape, you might think you were at Badlands National Park in South Dakota. In reality, this image is actually from Thornton Quarry just south of Chicago, Illinois; hardly a place where you would expect to see badlands-like formations. Badlands landscapes are predominantly erosional terrains. The rocks in… Continue reading The Badlands in Chicago?
Papago Park, located just a few minutes north of downtown Phoenix, features gorgeous Miocene sandstone formations and buttes, one of which is Hole in the Rock. As its name connotes, Hole in the Rock is known for its series of erosional openings and windows. The formation itself is composed of conglomeritic sandstone (individual clasts can… Continue reading Hole in the Rock (Arizona)