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  2. Baboquivari Peak Wilderness - Wikipedia

    en.wikipedia.org/wiki/Baboquivari_Peak_Wilderness

    Baboquivari Peak is a technical summit, meaning that it is only accessible by technical (class 5) rock climbing according to the Yosemite Decimal System.The wilderness is reported to have some of the best backcountry rock climbing in Arizona.

  3. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    Cataclasite – Rock found at geological faults – A rock formed by faulting; Eclogite – Metamorphic rock formed under high pressure; Gneiss – Common high-grade metamorphic rock; Granulite – Class of high-grade medium to coarse grained metamorphic rocks; Greenschist – Metamorphic rock – A mafic metamorphic rock dominated by green ...

  4. Grade (climbing) - Wikipedia

    en.wikipedia.org/wiki/Grade_(climbing)

    Adam Ondra on the sport climbing route Silence, the hardest free climbing route in the world and the first-ever at 9c (French), 5.15d (American YDS), and XII+ (UIAA).. The two main free climbing grading systems (which include the two main free climbing disciplines of sport climbing and traditional climbing) are the "French numerical system" and the "American YDS system". [2]

  5. Rock (geology) - Wikipedia

    en.wikipedia.org/wiki/Rock_(geology)

    Rock can also be modified with other substances to develop new forms, such as epoxy granite. [24] Artificial stone has also been developed, such as Coade stone. [25] Geologist James R. Underwood has proposed anthropic rock as a fourth class of rocks alongside igneous, sedimentary, and metamorphic. [26]

  6. Rapids - Wikipedia

    en.wikipedia.org/wiki/Rapids

    Rapids are categorized in classes, generally running from I to VI. [2] A Class 5 rapid may be categorized as Class 5.1-5.9. While Class I rapids are easy to navigate and require little maneuvering, Class VI rapids pose threat to life with little or no chance for rescue. [5] River rafting sports are carried out where many rapids are present in ...

  7. List of Grand Canyon rapids and features - Wikipedia

    en.wikipedia.org/wiki/List_of_Grand_Canyon...

    Mile 125.5 – Fossil Rapid (5) Mile 126.4 – 126.4 Mile Rapid (3) Mile 127.5 – 127 Mile Rapid (3) Mile 129.2 – 128 Mile Rapid (4) Mile 129.7 – Specter Rapid (6) River boats at Deer Creek Falls (Mile 136.9) Mile 131.1 – Bedrock Rapid (7) – The river splits around a very large rock outcropping. Going left of the rock is not recommended.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Armourstone - Wikipedia

    en.wikipedia.org/wiki/Armourstone

    Hydraulic Engineering Circular 11 (HEC-11) (Brown and Clyde, 1989) [5] Identifies six weight classes based on the minimum allowable d 50. Classes range from “facing” (75 lbs) to 2 tonnes. California Bank and Shore Rock Slope Protection Design, CABS (Racin et al., 2000) [6] Provides nine weight classes based on the minimum allowable W 50 ...