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The Rim Rock Shop
 Supporting Colorado National Monument Since 1964

Notice: Due to the government shutdown, the Rim Rock Shop is closed and will not be able to take any online or phone orders. Sorry for any inconvenience, we will be closed until the government ends the shutdown and reopens.

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Dakota Membership - $500 Level of Support

Part Number 985
Dakota Membership - $500 Level of Support
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Join at the $500 level to receive all of the basic benefits plus three Monument Calendars, and a Colorado National Monument Annual Pass.

Basic benefits include:
  • 15% discount at the visitor center bookstore and on-line
  • 20% discount at visitor center bookstore during the holiday season
  • Discounts at participating National Park bookstores
  • Member decal
  • Free admission to Spring and Fall Walks & Talks
  • Learning and volunteer opportunities
  • Invitation to Annual Meeting
Geology: Although the Dakota Formation does not now occur within the monument, it plays a large part in the historical context of the formations. On the very top of Black Ridge, the Dakota Formation once preserved sediments deposited on a coastal plain, in lagoons and on beaches as a great inland sea, extending from the Gulf of Mexico to the Arctic Ocean, invaded the interior of North America. Later another episode of mountain building elevated this area and started a new cycle of erosion. The relentless forces of erosion have stripped off those thousands of feed of sediment and have carved our magnificent canyons, exposing for us a wonderful story of earth's history.
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