Reconnaissance geologic map of the Jabal al Usayfir quadrangle, sheet 26/40C, Kingdom of Saudi Arabia
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Abstract
The Janbal al Usayfir quadrangle, sheet 26/40 C, is located approximately 195 km southwest of the regional center of Ha’il, in the north-central part of Saudi Arabia, and is bounded by lat 26°00’ and 26°30’ N. and long 40°30’ and 40°30’ E. Access is via the Al Madinah – Ha’il paved highway to Hulayfah or Ghazzalah, thence by unimproved road to Zarghat, located a few km from the northeastern corner of the quadrangle. Desert tracks lead from Zarghat to the rest of the area, but a large expanse of the area is underlain by Tertiary to Recent Harrat Ithnayn, and is impassable to land vehicles.
The area has low relief, broken by low hills and mesas of Proterozoic and Paleozoic rock, basalt, cinder cones, and Jabal al Usayfir. Drainage in the quadrangle trends generally to the east and southeast, but rainfall is low. The climate is typical of inland Saudi Arabia, with summer day temperatures reaching 45-50°C, and with generally cool nights. Temperatures can reach 0°C in winter. Vegetation is sparse.
The area is sparsely populated, and permanent water is found only in wells.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Reconnaissance geologic map of the Jabal al Usayfir quadrangle, sheet 26/40C, Kingdom of Saudi Arabia |
| Series title | Open-File Report |
| Series number | 85-579 |
| DOI | 10.3133/ofr85579 |
| Year Published | 1985 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 1 map : photocopy ; 56 x 50 cm., on sheet 95 x 71 cm. |
| Country | Saudi Arabia |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |