MINERALOGICAL RESEARCH COMPANY



General physical features of the Fulgurites from Eastern California Desert, Inyo Co., California

GENERAL INFORMATION ABOUT THE LOCALITY:

This exciting find was made several years ago, quite by accident.  The tendency for specimens from this find is to form as elongated, single tubes, sometimes slightly curved, but most often fairly straight down the length of the tube.  Branches are uncommon.  The finder was kind enough to provide the accompanying photos of the dig site.  These fulgurites were recovered from a sandy area where, in at least one case, an excavation more than 10 feet deep was made in order to recover the entire fulgurite!

OUTSIDE SURFACE:

Form:

Fairly straight, to slightly curved down the length of the specimen, usually equidimensional, tubular.  Small, secondary branches are uncommon.

Color:

Light gray.

Texture:

Fairly smooth, without ridges or large rocks attached.

Sand Granules:

Small bits of unfused Quartz sand, and tiny fragments of white Feldspar are attached.

GLASSY INTERIOR:

Color:

Light to medium “bottle green” to "gray green".

Texture:

Where the fulgurites are tubular and open, the texture of the glass is very smooth and shiny.

Bubbles (Gas Pockets) Present:

Numerous, ranging from microscopic to 3/8” in diameter on some of the very large specimens.

Click on photos for larger view


                           


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