Tag Archives: Rio Grande Rift

A Southwest Glossary: Geographical Terms—Río Grande Part 2

Rio Grande Gorge Bridge
Known by the locals as simply the “Gorge Bridge” or “High Bridge,” the three-span steel continuous-deck-truss structure with a concrete-filled steel grid deck, is a high-arch bridge that spans the Rio Grande Gorge. Many sources have the bridge ranging in height from 600 to 700 feet above Continue reading

A Southwest Glossary: Geographical Terms—Río Grande Part 1

Rio Grande Valley
The Rio Grande Valley has been inhabited at least since the Archaic period, as shown by petroglyphs on exposed rock surfaces and the remains of stone tools quarried in the mountains. San Antonio Mountain was a significant source of dacite (an igneous, volcanic rock) for tools. In historic Continue reading

A Southwest Glossary: Geographical Terms M to T

Mesa
In Spanish, the word means “table.” A mesa is an elevated area of land with a flat top and steep slides. Mesas rise sharply above the surrounding landscape, and the top of the hill is usually capped by a rock formation. Photo: Abiquiú, New Mexico.

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