LEGACY - “AA” Lava - Deschutes County, Oregon
Posted by: 
Volcanoguy
N 43° 54.646 W 121° 21.444
10T E 631891 N 4863273
Former geology marker along Trail of the Molten Land. Sign was removed in late 2011.
Waymark Code: WM1BH6
Location: Oregon, United States
Date Posted: 03/25/2007
Views: 44
This sign was located on the Trail of the Molten Land. In 2011, to meet current ADA requirements the Trail of the Molten Lands had to be rerouted and signs replaced. New signs were designed which are more colorful but in many cases less informative than they could have been.
Marker Name: ”AA” Lava
Marker Text: Several thousand years ago, molten lavas poured out of the side of Lava Butte, covering 6117 acres forming this large lavafield. There are two principal types of basaltic lava, both described by Hawaiian terms. This flow is “aa” (ah ah). As the surface cooled, the viscous “aa” became very rough and jagged.
Pahoehoe (Pah-hoy-hoy), the other type of lava is very fluid and cools with a smooth or ropy surface. Pahoehoe lava is visible at our “Lava Cast Forest.” For its location, check at the Visitor Center.
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