scoria - from the 2018 lava flow that buried Kapoho, HA

Description: If making multiple purchases, please read the note following the red text below! Scoria - black basalt scoria from the 2018 lava flow that buried Kapoho, Hawaii - hand/display specimen Scoria is the silica poor equivalent of pumice. Lava with a low silica content is runny, so gas bubbles tend to coalesce to form larger bubbles in basalt. In a silica rich granitic magma, high viscosity prevents bubbles from coalescing, so there are many more, but smaller, gas bubbles in pumice, one reason it floats longer in water. Near the top of an andesitic or basaltic flow, gas that was dissolved in the magma comes out of solution to form bubbles because of the reduction in pressure. These become frozen in place to form scoria. Deeper in the flow the basalt is more dense, with smaller bubbles, or even none. As an aa flow progresses, chunks of scoria and blocky lava tumble down the advancing front and are either bulldozed ahead by the advancing flow or are covered. This scoria was collected from an aa field at the edge of the 2018 Kilauea flow channel that almost engulfed the Puna geothermal plant, that buried the community of Kapoho and that eventually filled in Kapoho Bay completely. Very light weight, but with a specific gravity greater than 1, so it will not float in water, unless just momentarily. The pencil is 5.5" long, for scale. 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. 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, or one of those plus some number of coins, or you can let us make the selection. 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: 13.75 USD

Location: Olancha, California

End Time: 2024-12-09T08:03:20.000Z

Shipping Cost: N/A USD