Woodworthia Short Shoot Group Of Three Stalks


Woodworthia Short Shoot Group Of Three Stalks

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Woodworthia Short Shoot Group Of Three Stalks:
$12


Woodworthia short shootcalcite cast (Steinerocaulis sp.) Morrison Formation; Jurassic Utah

Most collectors of petrified wood are familiar with the Triassic genus Woodworthia and can easily recognize specimens of it by the "scars" of short shoots neatly preserved on the exterior rind of the limbs. Occasionally one is also able to see the trace of the short shoot all the way back from the rind to near the center of a slab on a polished transverse face of a specimen. But, what exactly was a short shoot and what did it look like? The easy answer to this question is that they were part of the reproductive organs of this genus (which incidentally did not survive the end of the Mesozoic period), and there were several different forms of woody buds in addition to the stalks which are being offered in this listing. We know this answer from fossils such as the one being offered here which comes out of the Morrison Formation (Jurassic) of south central Utah. Dayvault and Hatch wrote a magnificently detailed article about these vegetative fossils in the Rocks and Minerals magazine issue for July/August 2003. It can be purchased from the publisher on line and can be found by simply typing into your browser the title of their articleShort shoots from the late Jurassic Morrison Formation of SouthEastern Utah and your first hit will be for T&Fonline access. The authors describe the short shoots as consisting of woody buds at the tips of short stalks. The "scars" on the rind of Woodworthia specimens are the point at which these stalks emanated from the bark of the Woodworthia tree (and subsequently were broken off thus leaving the "scar"). It is worth quoting Dayvault and Hatch when they say that these are not colorful or showy display specimens. What they are is instead significant fossilorgans of the extinct Woodworthia and that fact alone makes them important to serious collectors of petrified wood and plant fossils.

If you know Woodworthia and its short shoot scars, then you probably will immediatelyconclude that this calcite castmust be rather small and you would be correct. These Steinerocaulis specimens measure under 1/4" (8 mm) in cross section across the stalk and theyvary fromapproximately 1/2" (13 mm) to 1" (28 mm) in length.

Please note that we are also listing severalforms of the the woody buds that formed at the tip of the stalks as well as this offering for the stalks themselves. If you are an enthusiastic collector, you may want to peruse our other sales and fixed price offerings on to add several of the forms to your collection. It is important to note that there is not conclusive data that indicates that the different forms came from different species of the Woodworthia genus. It is also possible that the different forms may have emanated from the same genera of trees. It is for this reason that Paleobotanists have assigned each morphologically different form to its own fossil genus and species.

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 common name of the tree, the Latin name of the genus or species, 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 $4.50 for delivery to addresses in the United States. We are happy to ship internationally but international buyers should use the postage rate calculator before offerding to determine postal rates for first class postage charges to their country. California buyers will be chargedState Sales Tax. Be sure to check out our other sales and visit our “my ” page to learn more about Mills Geological. We are happy to combine sale winnings to save you shipping costs.

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Woodworthia Short Shoot Group Of Three Stalks:
$12

Buy Now



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