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HILL COUNTRY
[Please
see
a
landscape video about the Hill Country]
[Please
listen to memories and
testimonies about the region]
The Hill Country or Edwards Plateau region is made up of
a 20 million acre area of Cretaceous limestone, broken in its center by
a 2 million acre intrusion of Precambrian granite known as the Llano Uplift.
The region stretches from Glen Rose in the extreme northeast, southwest
to Austin, San Antonio and Del Rio, and northwest to San Angelo, with
rainfall peaking in the east at 32 inches, and dropping to 16 inches on
its western edge. This plateau is cut by rolling hills,
canyons,
and spring-fed streams, and covered with a mix of ashe juniper, persimmon
and mesquite woodlands, oak savannas, and grasslands.
Some of the larger protected areas include the Balcones Canyonlands National
Wildlife Refuge and associated city and county preserves (32,600 acres),
the Devils River State Natural Area (19,989 acres), the Government Canyon
State Natural Area (6643 acres), Kerr State Wildlife Management Area (5370
acres), Lost Maples State Natural Area
(2174 acres), Pedernales Falls State Park (5212 acres), and other preserves.
The area has suffered extensive soil loss, bank erosion and invasion of
hardy, unpalatable woody species such as juniper, due to hard grazing
by sheep and goats. In more recent years, concern has grown over the conversion
from such agricultural uses, the related fragmentation of larger rural
tracts, and the development of tourist and retirement communities. Given
the porous substrate, there is worry that runoff from this more intensive
development will pollute area streams and aquifers. The Hill Country's
Edwards Aquifer is also threatened by San Antonio's complete reliance
on it for its drinking water, which may cause its partial dewatering and
contamination by lower saline aquifers.
Hill Country
communities represented in the archive include:
Additional information about the region is available from:
Bamberger Ranch Preserve
Bexar Audubon Society
Bexar Land Trust
Greater Edwards Aquifer
Alliance
Hill Country Conservancy
Hill Country Alliance
Kerr Wildlife
Management Area
Lady Bird Johnson Wildflower Center
San Marcos River Foundation
Save Barton Springs Association
Save Our Springs Alliance |