English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In the Tungsten Hills, at the western base of the Sierra Nevada, contact-metamorphic scheelite deposits occur in many small, isolated masses (called "pendants") of metamorphosed sedimentary rock surrounded by granite and quartz diorite. Although the age of the metamorphic rocks is unknown, the ores are genetically connected with the granitic rocks of probable late Jurassic age. Most of the ore bodies are small and are of relatively low grade, ranging from 0.5 to 1.0 percent of WOs; but they have been successfully operated because their favorable location permits mining at low cost. Although the known larger ore bodies are apparently nearly exhausted, numerous small, low-grade deposits, ranging in size from a few hundred to a few thousand tons, remain undeveloped. It is estimated that there is 100,000 tons of probable ore containing 0.25 to 0.5 percent of WOs in reserve. Additional ore bodies may be found at depth in the Round Valley deposit, for that pendant is large and persistent.

Tungsten deposits in the Tungsten Hills, Inyo County, California