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LATEST INFO
Visit Yaquina Head web site for latest information: https://www.blm.gov/yaquina
Entrance Fees
- Personal passenger vehicle: $7 for a 3-day pass
- Annual Yaquina Head: $15 for a 12-month pass
- Motorcycle: $3 for a 3-day pass
- Bicyclist, walker: free 1-day pass
- Most Federal Recreation Passes can be used at the site for entry.
Going up and down some stairs will be required to log this cache.
Cobbles sometimes referred to as Cobblestone are chunks of rock broken off other rocks by physical weathering and being a size between 2-1/2 to 10 inches
The coordinates take you to Cobble Beach, it's just SE from the Yaquina Head Lighthouse. Access is via the stair case located near the upper parking lot.
At low tide, the pools of sea water on the beach are alive with colorful sea stars,
anemones and urchins.
The floor of Cobble Beach is not comprised of sand, but of small basalt rocks (Cobbles). The basalt lava flow covered this region millions of years ago. Over the years, erosion brought these rocks down from the beachside cliffs. The continual back and forth of the tides over the rocks have made them smooth and polished.
Yaquina head is made up of this once-molten flow which originated near Kahlotus, WA on the Snake River, then traveled over to and across the Columbia River in the gorge, then under the then non-existent Mt. Hood, then on to Silver Falls and finally here at the head. But it doesn't stop here. It worked its way under the sandstone offshore and out some distance where it popped back up as undersea rock formations. One flow of hot lava, 300 mile journey!
In the video Nick describes one identifying characteristic of the Ginko Flow: gold colored crystals.
See Nick's geology videos: Nick Zentner
Permission for this cache has be granted by:
Yaquina Head Site Manager
Bureau of Land Management
To log this cache please do the following
Message me after you log the cache.
1) Where else would cobblestones be found?
2) Name two applications requiring cobblestones?
3) Describe what you see in the tide pools.
4) Take a picture of yourself on the beach holding some "Cobbles".
Yaquina Head Outstanding Natural Area | Bureau of Land Management - Bureau of Land Management | U.S. Department of the Interior
From exploring tide pools teeming with life to witnessing Oregon's tallest lighthouse, there is something for every visitor at Yaquina Head. Yaquina Head Outstanding Natural Area extends out from the Oregon coast, one mile into the Pacific Ocean. Standing 93 feet tall at the westernmost point of the basalt headland, the lighthouse has been a bright beacon of the night, guiding ships and their supplies along the west coast since the light was first lit on August 20, 1873.
www.blm.gov
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