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It is the state rock of California, USA and the California Legislature specified that serpentine was "the official State Rock and lithologic emblem." [4] In 2010, a bill was introduced which would have removed serpentine's special status as state rock due to it potentially containing chrysotile asbestos. [37]
In 1965, California became the first state to name an official state rock. A 2010 effort led by State Senator Gloria J. Romero, a Democrat from Los Angeles, sought to remove serpentine from its perch as the state's official stone.
Serpentine (Serpentinite) is the California State Rock. It was formed from deep sea or mantle rocks. This rock was squeezed toward the surface by tectonic plate movement, and thus feels greasy, as it has been polished over millions of years. Graywacke Sandstone after crossing Leonard's Bridge.
Serpentine subgroup is a set of common rock-forming hydrous magnesium iron phyllosilicate ((Mg,Fe) 3 Si 2 O 5 4) minerals, resulting from the metamorphism of the minerals that are contained in mafic to ultramafic rocks. [6] They may contain minor amounts of other elements including chromium, manganese, cobalt or nickel.
Serpentine soil is an uncommon soil type produced by weathered ultramafic rock such as peridotite and its metamorphic derivatives such as serpentinite. More precisely, serpentine soil contains minerals of the serpentine subgroup , especially antigorite , lizardite , and chrysotile or white asbestos, all of which are commonly found in ultramafic ...
Pecked curvilinear nucleated petroglyphs on a rock on Ring Mountain. Ring Mountain is a unique geological site, where rocks that formed in ancient subduction zones can be observed. [11] Serpentinized peridotite crops out on the two summits of the mountain, and the steep upper slopes are underlain by serpentinite-matrix mélange. [5]
The Klamath Mountains are a rugged and lightly populated mountain range in northwestern California and southwestern Oregon in the western United States.As a mountain system within both the greater Pacific Coast Ranges and the California Coast Ranges, the Klamath Mountains have a varied geology, with substantial areas of serpentinite and marble, and a climate characterized by moderately cold ...
Sheared block-in-matrix fabric composed of serpentinite blocks in serpentinite matrix, exposed on Perles Beach, Angel Island, Marin County, California. Pencil for scale. Pencil for scale. The strong anastomosing foliation is folded, sub-vertical in the lower part of the photo and more gently dipping in the upper part of the photo.