Description: If making multiple purchases, please read the note following the red text below! Fine-grained white Navajo sandstone - teaching hand/display specimen The Navajo sandstone ranges from pinkish orange to white, The color is due to an iron oxide coating on the sand grains. In some areas reducing fluids flowed through the formation, removing the iron oxide coating. In either case, because the Navajo was deposited during the Jurassic in an immense coastal and inland dune field, the sand grains are frosted - they essentially sand blasted each other. The frosted nature of the grains is characteristic of the Navajo and is easily visible under 20x magnification, though a student with sharp eyes can see this with 10x. The Navajo Sandstone makes up the cross-bedded cliffs at Zion National Park in Utah. Locally it is poorly to moderately well cemented with silica cement. These specimens are moderately cemented and will stand up to student examination, though grains of sand can be rubbed off. Near Hurricane, Utah the Navajo sandstone is 2,400 feet thick. These sand grains were carried west from the Appalachians by a Mississippi-scale river system and deposited at the continental edge, in present day Utah. Deposited on beaches by the waves, the sand grains were picked up by the wind and deposited in a gigantic dune field similar to Egypt's Great Sand Sea. The sand grains in these specimens are larger than those of a silt and will feel like fine sand to a student. It would be instructive to compare this sandstone with one is larger grained, with one that is cemented with calcium carbonate, and with different colored sandstones, as sandstone has great variety and a student should not see only one example. These specimens will fit into a 3.5 x 5.25" specimen tray. We include data with every specimen: collecting locality for mineral specimens and for rocks also the formation and age, if determined. Select a specimen: When more than one specimen is shown, you can select a particular specimen by telling us what is in the photo with it - a black mechanical pencil, a silver and black pen, a silver and blue pen, or one of those plus some number of coins, or you can let us make the selection. Making multiple purchases?Just add items to your cart. When finished shopping, click on “request total” at upper right in the Shopping Cart window. Do not proceed to checkout. We will send an eBay invoice with the correct combined shipping. The combined shipping will often be less than eBay shows. Please wait for that invoice before paying. There is no obligation to purchase. You can decide after seeing what shipping will cost.Shipping: By Priority Mail or USPS Ground Advantage, whichever is cheaper. Click > here < for shipping rates. See comment at Note! Use back button to return to this page. International customers: We sell and ship internationally. If eBay’s page does not let you enter your country name to determine the shipping cost for something you are interested in, please contact us. We can tell you what the shipping would cost and how to make the purchase. You can then decide if you wish to complete the transaction. Use the Contact Seller link in the Seller Information box on the right side of this page.Pay securely with your debit or credit card through PayPal! You do not need a Pay Pal account to do this. Yes, we do combine shipping!
Price: 10.45 USD
Location: Olancha, California
End Time: 2025-02-03T07:24:06.000Z
Shipping Cost: N/A USD
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Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
