Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g., kaolin, Al 2 Si 2 O 5 (OH) 4) and tiny fragments (silt -sized …

shale, any of a group of fine-grained, laminated sedimentary rocks consisting of silt- and clay-sized particles. Shale is the most abundant of the sedimentary rocks, accounting for roughly 70 percent of …

Shale is the most abundant sedimentary rock. It is found in sedimentary basins worldwide.

The Barnett Shale is a hydrocarbon-producing geological formation of great economic significance to Texas.

Shale is the most common sedimentary rock type, constituting approximately 70% of exposed sedimentary rock on Earth. Shale is characterized by its laminated structure, with thin, parallel layers …

Oct 28, 2015 · Explore the structure and origin of shale. Learn how it's formed from clay and silt and its role in Earth's sedimentary layers.

Jan 5, 2023 · Shale is the most abundant of all sedimentary rocks. It is composed primarily of soft clay minerals, but may include variable amounts of organic matter, calcareous material, and quartz …

3 days ago · RESTON, Va. — The U.S. Geological Survey released its assessment of undiscovered gas and oil in the Woodford and Barnett shales in the Permian Basin, assessing that there are technically …

Jul 30, 2025 · The composition of shale is dominated by clay minerals, such as kaolinite, illite, and smectite, along with varying amounts of quartz, feldspar, carbonate minerals, and organic matter. A …

Jul 20, 2025 · Shale is a type of sedimentary rock that plays a significant role in shaping landscapes and influencing soil characteristics. Its presence in the geological substrate impacts soil formation, …