Saturday, August 10, 2013

Geo 365: August 10, Day 222: Scenic Shore

I'm unsure of the exact location of this photo, but it's somewhere in the Sunset Bay/Shore Acres/Cape Arago parks area. The plane of the uplifted terrace in this region is clear, as is the modern terrace at approximately sea level. We were headed to Sunset Bay for the low tide, and this trip was chosen to coincide with a series of negative tides, so this is getting close to maximum exposure of the modern terrace. It may look as if we're looking at a syncline in the cliff in the mid-distance, but that's an illusion. Along the right portion of the cliff, we're looking more or less along strike, so the beds appear mostly horizontal. About the middle of the photo, the cliff changes orientation to almost perpendicular to strike, so the dip of the beds becomes clear. So you're not seeing a fold, but almost uniform tilted beds from two different perspectives.

Photos of Sunset Bay can be seen in the week of February 11 through 17 in the Geo365 series.

Photo unmodified. March 8, 2012. Location uncertain; somewhere in the vicinity of Cape Arago/Shore Acres/Sunset Bay State Parks, Oregon.

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