Hollywood, CA Quadrangle 2018 USGS 7.5 Minute Topo Map
To download the Hollywood, CA Quadrangle 2018 USGS 7.5 Minute Topo Map, please use the link below.
To download the Hollywood, CA Quadrangle 2018 USGS 7.5 Minute Topo Map, please use the link below.
Long Beach, California Geology & Hydrogeology This post summarizes the geology of Long Beach, California. However, some geological and hydrogeological data may be incomplete or pending review. Nonetheless, students, geologists, and earth scientists are welcome to openly use, critique, and contribute information. To do so, please refer to the comments function below. Ultimately, all post…
Geology for Rock Climbers Geology for rock climbers tends to be a science of newfound interest. A field of study, that apparently, wasn’t the most popular among Millenials during their formative years. Although to be honest, most people do remember Earth Science class in high school for its tranquilizing effect. But fast forward 10- to…
Bismuth (Bi) – The Popular Rainbow Element Bismuth Chemical & Physical Properties Bismuth has been known and used by humans for hundreds of years for its host of remarkable properties. The mineral we know as bismuth was originally referred to as Wismut by 15th-century German monks, the name coming from the German phrase meaning “white mass.”…
The Historical Salton Sea Fishery The Salton Sea fishery is a historical part of the Salton Sea, California’s largest body of water and arguably, the largest environmental disaster to date. At a time before toxicity levels at the Salton Sea became problematic, many fish species were stocked into the lake for sport and commercial purposes….
Agate Types & Geological Properties of the Agate Crystal The agate crystal is a microcrystalline-quartz mineraloid that has a lustrous display of multi-color banding and results from long-term accumulations of siliceous groundwater deposits in rock cavities. Much like other mineraloids, all agate types form over thousands of years inside the existing voids of other igneous,…
The St. Francis Dam Disaster The St. Francis Dam disaster of 1928 was the failure of a large concrete gravity dam due to unmitigated geologic hazards, causing over 55 miles of violent flooding, and over 400 deaths. It is said to be California’s worst engineering catastrophe to date. Updated April 11, 2024. Saint Francis Dam…