- World Report 2024: Sudan (hrw.org)
On April 15, 2023, fighting broke out in Sudan’s capital, Khartoum, between the Sudan Armed Forces (SAF) and the Rapid Support Forces (RSF), an independent military force, and quickly spread across the country. This followed months of mounting tensions between SAF leader General Abdelfattah al-Burhan and RSF leader Mohamed Hamdan Dagalo (“Hemedti”) over the integration of the RSF into the SAF. Burhan and Hemedti had jointly carried out a military coup against the transitional government in October 2021.
- Renton Formation—Nonmarine fine- to medium-grained arkosic sandstone and siltstone containing abundant subbituminous coal beds and carbonaceous shale.
- Tukwila Formation—Andesitic to dacitic volcanic sandstone, siltstone, shale, tuff-breccia, tuff, volcanic mudflow (lahar), carbonaceous shales, and minor lava flows or sills. Typically massive; only local sedimentary interbeds indicate structure. K-Ar age on plagioclase from tuff-breccia at top of unit, about 3 km west of quadrangle, yielded an age of 42.0±2.4 Ma (Turner and others, 1983)
- St. Peter Sandstone
- Tenino Sandstone
- The Chuckanut Mountains were formed by the folding of the Chuckanut Formation (which is predominantly made up of layers of 55-million-year-old sandstone, conglomerate, shale, and bituminous and sub-bituminous coal) and the later Huntingdon Formation (predominantly shale and sandstone) on top, as well as an exposed section of pre-Jurassic-age phyllite
- The Olympics are made up of obducted clastic wedge material and oceanic crust. They are primarily Eocene sandstones, turbidites, and basaltic oceanic crust.
- About 500 million years ago, a shallow sea covered the area, laying down layers of sand and minerals that make up much of the sandstone bluffs now seen along the river.
- Sandstone (Wikipedia)
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks.
Skipping down the cliff