Welcome to the Columbia River Gorge.
Here you will enjoy an expansive view of the Columbia River Gorge which was formed millions of years ago.
All the information you need is on the cache page.
There are a few questions and a photo requirement to log this earth cache, but not to worry as the answers are easily found, you just have to go there, read the following information on the cache page, answer the questions and take a picture for your log. Then soak in the magnificent views!!
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The Columbia River ranks as one of America's greatest waterways. This great river annually discharges in the neighborhood of seventeen and a half Billion gallons of water into the Pacific Ocean! This is more than any other river in North or South America. During it's 1270 mile journey to the Pacific, it flows through four mountain ranges; The Rockies Selkirks, Cascades and Coastal mountains.
Volcanoes spewed lava across 64,000 square miles of land in present-day Washington, Oregon, and western Idaho. The heavy lava flowed west toward the ocean, roughly along the contours of what will become the Columbia River, settling in miles-thick flat basalt (hard, black rock) layers.
The Columbia River Basalt Group is the principal rock unit in the gorge. The CRBG is a series of basalt flows (flood or fissure basalts) that were erupted between 17 million and 6 million years ago during the Miocene.
The Columbia River shaped the Gorge as a physical place by carving through successive uplifts and volcanic outflows beginning about three million years ago and reaching something like its basic form about a million years ago. The Gorge itself is an 80 mile long and up to 4000 ft. canyon cutting through the Cascade Mountain Range. The North canyon walls are in Washington state with the South walls being in Oregon state. This gorge is the only near sea-level passage through the Cascades.
The Columbia River has the biggest discharge into the Pacific Ocean of any river. Water depths have been estimated at 400 feet (120 m) over modern Portland, Oregon, and at 1,000 feet (300 m) at Wallula Gap.
For you Benchmarkers out there, the Knob on top of the Vista House domed roof is loggable.
Logging requirements for this Earth Cache are as follows:
1- What type of rock is the Columbia River Gorge comprised of?
2- How was the Columbia River Gorge formed?
3- How deep is the deepest part of the Columbia River?
4 - During which period did the CRGB flows erupt?
5 - Post of pic of yourself (face not req'd) or body part or your GPS with Mr. Samuel Lancaster (he's near the South Entrance of Vista House on the wall to the right)
Please send your answers through the geocaching messaging feature.
Any logs without the photo will be deleted.
https://stateparks.oregon.gov/
https://stateparks.oregon.gov/index.cfm?do=park.profile&parkId=108
https://stateparks.oregon.gov/index.cfm?do=v.contact