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Edwards Plateau: San Antonio
built 607 days ago
The Llano Estacado and Edwards Plateau merge into each other along the central portion of the summit of the greater plateau, and there is no known line of demarcation between them. There is a great difference between the characters of their surface, their soils, and the underlying geologic strata, which collectively gives to each of the two regions a distinct character. The soil and underlying rocks of the Llano Estacado consist of unindurated loams, marls, and sands. Hardly a stone of building size can be found in its broad extent. The Edwards Plateau is in part a rough limestone country, resembling in some respects the western margin of the limestone country of the Grand "
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The Edwards plateau contains only a few relatively small areas of intact habitat. These occur around Austin, where about 30 percent of a 182 square kilometers (km2) tract has been acquired and put under conservation management. About 50 percent of a 122 km2 tract in the Balcones Canyonlands has been acquired. Other intact blocks remain in Real County along the Frio River and in small patches outside San Antonio in northwest Bexar County.
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[One] notable point was the occasional tendency for trajectories from the east and west portions of the Edwards Plateau to take different paths. In most instances the Austin source trajectory followed one track while the Junction and San Angelo trajectories behaved differently (but similar to each other). These cases usually resulted from a passing front or a developing low pressure area to the north. The Austin trajectories appeared to be more readily influenced by wind flows ahead of the fronts or developing systems. Trajectories from the other two locations tended to begin in the same direction but then failed to get caught up in those same flows. They usually would travel slower and/or shift direction.
"The Nature Conservancy identified the Government Canyon/San Geronimo Creek corridor as one of our priority conservation areas during our two-year, science-based ecoregional planning process for the Edwards Plateau," said Paul Barwick, Edwards Plateau project director at the Conservancy. "The reason this region has tremendous natural appeal is because of its wealth of resources, including heritage ranches, clean and plentiful surface and groundwater, considerable aquifer recharge capacity, scenic vistas, topography, and native plant, animal and insect diversity."
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