Nine rock types including Sandstone, Limestone, Siltstone, Dolomite and Marl collected from six different rock formations of the Salt Range area of Pakistan were tested to evaluate the correlations between the uniaxial compressive strength and the corresponding values of the point load index. Two hundred rock cores were drilled and used for the uniaxial compressive strength and point load index...

Received: August 22, 2016 Revised: February 07, 2017 Accepted: March 10, 2017 Abstract: Background: Tight sandstone reservoirs play an important role in the oil industry. The permeability of tight sandstone reservoir generally has stronger stress sensitivity than that of conventional reservoir because of the latter’s poor physical properties. However, the production analysis of tight sandstone ...

The Taunsa uranium mineralisation is hosted by the upper Miocene–Pliocene Litra Formation, part of molasse sediments (Siwalik Group) deposited in Himalayan foreland basin eastern Sulaiman Range, Dera Ghazi Khan, Pakistan. Formation only rock unit hosting economic-grade occurrences stratigraphic record Surface radioactivity mainly associated with cemented layers host sandstone, known as hard-ban...

Zion National Park and related areas of southern Utah contain exposures of the largest ancient wind-blown (eolian) dune system known in North America, preserved in the Jurassic Navajo Sandstone. Despite the common lack of absolute age constraints, ancient desert sand seas (ergs) and their erg margins can record valuable paleoclimatic proxies in the sedimentary record. The central erg portion of...

Many habitat specialist species are originally composed of small, discontinuous populations because their habitats are naturally fragmented or patchy. They may have suffered the long-term effects of natural patchiness. Mediterranean heathlands, a representative habitat in the Strait of Gibraltar region, are associated with nutrient-poor, acidic sandstone soils. Sandstone soil patches in the Afr...

In the Junggar basin, northwest China, many high gamma-ray (GR) sandstone reservoirs are found and routinely interpreted as mudstone non-reservoirs, with negative implications for the exploration and exploitation of oil and gas. Then, the high GR sandstone reservoirs' recognition principles, genesis, and log evaluation techniques are systematically studied. Studies show that the sandstone reser...