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Question
photo 1
photo 1  
Dear Mr. Reszka,
I play at this golf course in Irvine, CA
Near one of the tees is this large rock, its approximately 15 feet by 15 feet by 8 feet high
The cart path comes close to one side of the rock and one day one of my golfing buddies remarked that the rock was cut to make room for this cart path. I replied that the rock was untouched by man.
Since neither one of us has a clue could you take a look at the attached photo and tell us who is correct?

thank you

Answer
Hi Gary,
Interesting...it looks to me like normal erosional characteristics.  I'd say it's completely natural.  Pretty big to move, so I'd say it was dropped there during the last glacial advance.  Big rocks like that are called "glacial erratics".

Hope this helps.
Bob

Geology

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C. Robert Reszka, Jr.

Expertise

I can answer any general geology question (rocks, minerals, stratigraphy, geomorphology etc.). My expertise is in the geology of the Michigan Basin, PreCambrian, Paleozoic and Recent. I can answer questions concerning mining and petroleum exploration and production and the laws concerning those activities. I can also answer questions concerning stratigraphy of the Michigan Basin. I will also answer questions about mineral and rock collecting in the Basin. I won`t be able to answer many specific questions on hydrology, geophysics or geochemistry. I may be able to answer very general questions in those venues.

Experience

I have been working for the State of Michigan for 36 years as a Geologist and a Resource Analyst. I have experience with Subsurface Geology and Petroleum Geology, mining in Michigan, and Sand Dune Mining and Protection issues.

Organizations
Michigan Basin Geological Society

Publications
Decade of North American Geology.
Bedrock Geology of Michigan

Education/Credentials
BS Wayne State University

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