Description: If making multiple purchases, please read the note following the red text below! 0 0 0 Tufa - hand specimen of tufa formed during the Pleistocene high-stand of Lake LahontanTufa is a calcium carbonate deposit that forms around the outlet of a hot spring that emerges below the surface of a body of water. These examples were formed during the Pleistocene high-stand of Lake Lahontan, which filled a connected grouping of basins in Nevada east of Reno. It was similar to ice age Lake Bonneville in Utah, and now is greatly reduced in size. Its peak was approximately 12,700 years ago and its largest remnant is Pyramid Lake, currently around 500 feet deep. The water depth there during the Pleistocene was 900 feet, and ancient shorelines can be seen far above the current lake suface, as strand lines on the surrounding mountains. With the climate drying at the end of the Pleistocene, endorheic lakes in the Basin and Range Province, which are lakes with no outlet to the the sea, gradually evaporated, leaving salt-flat playas in the bottoms of the basins.This tufa was formed where springs emerged from a limestone block below Lake Lahontan's surface and near the lake shore. Whether or not tufa is purely a chemical precipitation, where calcium-rich spring water meets carbonate-rich lake water to precipitate calcium carbonate, or where there is also a biological component as well, is a topic still under discussion. Both are likely.This tufa was collected in Churchill County, Nevada, roughly 15 miles south of Fallon and just west of US Highway 95. Making multiple purchases? Just add items to your cart. When finished shopping, click on "view cart" and then click on “request combined shipping” at upper right in the Shopping Cart window. Do not proceed to checkout. We will send an eBay invoice with the correct combined shipping. Shipping: Priority Mail or Ground Advantage, whichever is cheaper, unless we can find a better rate. Rates vary by weight and zip code. We can usually ship for less than eBay will charge, and will refund the overpayment as soon as the box is packed. 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: 2025-02-06T02:11:15.000Z
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
