Image: Gates effect
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Description: The approach−"opening" of the "Gates of the Mountains" — as they would have been viewed by the 1807 Lewis and Clark Expedition going upriver. Outcrops of massive Madison Limestone flank the Missouri River at the 'narrows.' Located within the Gates of the Mountains Wilderness Area of the Helena National Forest, in Lewis and Clark County, Montana.
Title: Gates effect
Credit: Own work
Author: Montanabw
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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