Polished GIRVANELLA Large colonies of Lower Cambrian algae - end cut

Description

These interesting, very early algal fossils are "Oncolites" which are algae colonies that form spheres or oval shapes as differentiated from "Stromatolites" which are algal colonies forming cylindrical or tube shapes.  We recently acquired some old stock material that contains considerably larger oncolite colonies than the fossils we have had for several years.  These oncolites measure between a half and three quarters of an inch on the longest axis (11mm to 19mm).  In addition to their larger size, many of these colonies have been preserved with a bit of iron oxide in the mix which makes for an outstanding display specimen.  We were so impressed with the colorful nature of the fossil that we turned it over to our lapidary and the result is a polished end cut with cross sectioning of colonies on the cut and polished face and colonies weathering out on the all natural back side.  They are taxonomically identified as
Girvanella sp.
The material comes from the Lower Cambrian Chambliss Limestone Formation in San Bernardino County, California.  Some research on the internet suggests that these larger colonies may come from lower (older) strata of the Chambliss Fm.
Check out our photos on this listing - we show the polished face and three closeups of individual colonies on the polished face.  The specimen measures a
pproximately 4.5" x 3" on the polished face.  It is approximately 5/8" thick".  Special note to our international algae collectors:  this is a relatively heavy specimen.  Shipping weight will be approximately 2 pounds so be sure to use the eBay rate calculator to determine the shipping cost to your country.  This specimen can travel by first class mail internationally but will still be costly.  Domestic customers will enjoy the USPS flat rate package by priority mail.
We specialize in petrified wood and plant fossils which are accurately identified as to locality of origin and family, genus or species. We don’t guess and when we don’t know, we say so! Your specimen will come with a label identifying the specimen, the locality where it was collected, the formation and age of the material and any other pertinent information we have gleaned from our literature search.
Buyer to pay shipping charge of .00 for delivery to addresses in the United States.
We are happy to ship internationally but international bidders should use the eBay postage rate calculator before bidding to determine postal rates for the postage charges to their country
.
Be sure to check out our other auctions. We are happy to combine auction winnings to save you shipping costs.
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