Description: If making multiple purchases, please read the note following the red text below! Tholeiite basalt aa from the flow that destroyed Kapoho, Hawaii in 2018 - large hand/display specimen Tholeiite basalt, rising from partial melts of peridotite in the mantle, is the most common igneous rock on earth and makes up the oceanic crust. It is the type of basalt found on the moon. Peridotite is composed primarily of yellowish-green olivine and pyroxine. Olivine crystallizes at a high temperature and is one of the first minerals to form crystals in the rising magma. It is common in Hawaiian basalts, weathering out of a Mauna Loa cinder cone near South Point, where it is concentrated in a cove to form a famous green sand beach. Aa forms when lava cools quickly and moves fast, with the surface breaking up into a clinkery mass of loose jagged pieces. Aa flows tend to be thicker than pahoehoe and are almost impossible to walk on. This aa was formed on the flow from Kilauea's east rift zone that consumed the community of Kapoho in 2018 and completely filled in Kapoho Bay, forming a lava delta. This aa is extremely loose and scratchy in the flow and these examples will impress any student that walking on an aa flow would be a challenge. The field photos are views of the structure of this flow.The pencil is 5 1/2" long, for scale. Select a specimen:When more than one specimen is shown, you can select a particular specimen by telling us what is in front of it - a black mechanical pencil, a silver and black 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 "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. Rates vary by weight and zip code. We can 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: 19.25 USD
Location: Olancha, California
End Time: 2025-02-07T06:09:01.000Z
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
Modified Item: No
