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.
The Black Quartz Crystal (Morion) is Actually the Smokey Quartz Gemstone The black quartz crystal is actually the same mineral as smokey quartz and morion quartz, and only differs from the common quartz mineral due to its aluminum content. In fact, aluminum is the root cause of its light-absorbing characteristic, which causes a translucent-gray to…
Is the Earth Around Millennium Tower Sinking? Is the earth around the Millennium Tower sinking? Built-in 2008, the Millennium Tower in San Francisco has reportedly sunken about 17 inches into the ground surface. This subsidence is a consequence of improper geotechnical engineering design and potential changes in the hydrogeological setting. Moreover, surveyors indicate the structure is…
San Carlos Olivine & Peridot The San Carlos Apache Reservation is one of the earth’s richest resources olivine-rich rocks. San Carlos Olivine is a name that refers to a group of closely related minerals, with very similar chemical compositions, that are found in igneous rocks in the Apache Reservation. These olivine minerals consist of silicon…
Geology of Needles, California & Hydrogeology This post is a briefing on the geology of Needles, California. Some geological and hydrogeological data may be incomplete or pending review. Nonetheless, students, geologists, and earth scientists are welcome to openly critique, question, or contribute information to this post using the comments function below. All data is subject…
Geothermal Energy Geothermal energy involves harnessing natural volcanic heat within the Earth’s crust and converting it to electricity aboveground. The “heat beneath our feet” comes from groundwater aquifer systems that flow near molten rock. And the high-temperature groundwater runs through a series of expansion tanks and power turbines to generate electricity. Updated June 3, 2023….
Fire Opal Gemstone – Geology & Mineralogy Information Fire Opal is an amorphous mineraloid comprising an accumulation of tiny hydrated silica spheres that produce a dominant reddish-orange spectrum upon light reflection. Although it is commonly misclassified as a “mineral,” fire opal is actually not a mineral because it does not have its own crystalline structure….