from "Finding Oregon's Best" presenting Gallery40 ... SLIDESHOWS Adobe Flash Player Required
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Basin Range Map |
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Oregon
Basin Range Pictures ©0990 Quarter Horse Sale near Burns |
©0982
Alvord Desert
Mickey Hot Springs |
©0330a
Basin Range Run Free-Wild Horses |
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Migratory
Birds Refuge
©0977 Summer Lake Paisley, OR |
©0630
Pelicans-
Klamath Lake |
Oregon's
Basin Range ©0979 Aspens |
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This Gallery is
about the area often called the "Empty Quarter",
the Oregon Basin, part of the *Hydrographic
Great Basinof the United States, is among the
most sparcely-inhabitated areas of Oregon. It
is not one but several basins with similar characteristics.
There's the Harney Basin, Silver Lake Basin,
Warner Basin, Goose Lake Basin, Catlow-Pueblo-Alvord
Basin, and the Summer Lake-Abert Lake Basin.
In all the basins, the land
has fractured allowing one area to rise abruptly and
the rest to settle into a flat plateau. These
striking variations in landscape are called horst
and graben or quick rising mountains and very flat
valleys.
The Oregon Basin also includes
remnants of prehistoric lakes which are now shallow,
salty lakes which can't grow fish but do grow brine
shrimp for migratory fowl. These "playa lakes" are
in the flat basins and have no outlet to the sea.
Geological Faulting through time has obstructed
their seaward path. Hot summers dry the precipitation
which falls as snow...then in spring it melts temporarily
filling the playa lakes. The result? Salt!
Abert Lake has the distinction
of being the third largest salt lake in North America!
Slightly salty lakes,
such as Crump Lake and
Campbell Lake of the
Warner Basin ,
Goose Lake, or
Summer Lake are excellent
stop overs for migratory birds.
The Steens
Mountain, rich with Aspen Trees,
is a raised fault-block mountain of 9773ft and therefore
is the "horst". The Alvord Basin, the flat adjacent
area is a "graben". The Alvord Desert rests 4000'
above sea level and is in the rainshadow of the nearby
Steens Mountain so it's a barren desert floor
of dried caked mud.( white rhyolyte) The Alvord gets
about 9" rain/year and to be there during a
rainstorm is a unique treat.
The Alvord is alkaline and
therefore supports little vegetation except
sagebrush which is fairly good as cattle, antelope,
and deer food. The Pueblo Mountains
near Fields (spring board to the dusty
Alvord Desert) is made up of two fault block ranges.
Hot springs of bubbling,
steaming Water also
punctuate the desert. These springs originate
several thousand feet below the surface and begin
their trip upward at 220 degrees!
The Hart Mountain National
Antelope Refuge (established
in 1936) is located on another horst (ie fault block
ridge). Hart Mountain
is in south-central Oregon and is visited by antelope
herds and the coyote that enjoys
their taste. Predation is so severe by coyotes
that fawn survival has fallen drastically. When
cattle were allowed to graze
the refuge, the coyote problem was less severe as
the antelope would birth their fawns amid the
cattle herd for protection. In 1991 cattle were
no longer allowed on the refuge...gone is the shield!
Ever since
Pete French built his round
barn (to break horses for herding) there have been
large cattle ranches in the area and self sufficient
cattle folk to tend them. Cattle and
craters populate the area. Diamond
Craters is a 60 sq mile basaltic lava flow between
Burns and Steens Mountain. East of Diamond
wild horses can still be
spotted in this timeless area.
Seeing an Alvord Sunrise punctuates
why this area is part of the GREAT basin!
Paul and Marilyn Peck
Copyright ©2008 Strength
in Perspective
All Rights Reserved
Last Updated 2-11-2012