USGS 7.5 Minute Long Beach, CA Quadrangle 2018 Topo Map
To download the 2018 United States Geological Survey USGS 7.5 Minute Long Beach, CA Quadrangle Topo Map, please use the link below.
To download the 2018 United States Geological Survey USGS 7.5 Minute Long Beach, CA Quadrangle Topo Map, please use the link below.
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…
Blue Opal Gemstone The blue opal gemstone, like all other types of opal, is not a mineral. Instead, it is an amorphous mineraloid, which means it is a substance that comprises a specific arrangement of smaller microcrystalline silicas, which result in a blue spectrum of light reflection. Blue opal has an appealing luster and appearance,…
Torrance, CA Quadrangle 2018 USGS 7.5 Minute Topo Map To download the Torrance, CA Quadrangle 2018 USGS 7.5 Minute Topo Map, please use the link below. PDF Download – Torrance, CA Quadrangle 2018 USGS 7.5 Minute Topo Map
Soil pH Test Strips The pH of soil can be measured using a variety of different devices, or pH testers, which can quickly indicate to a user the pH of their soil. Soil ph test strips determine a numerical value indicating the acidity or alkalinity of soil. The pH scale ranges from 0 to 14,…
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,…
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.”…