{"product_id":"siltstone-teaching-student-specimens-unit-of-5-specimens","title":"siltstone  -  teaching student specimens of a Miocene siltstone from the Ridge Basin, California   UNIT OF 5 SPECIMENS","description":"\u003cp\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cb\u003eThis siltstone is Miocene in age, is moderately lithified, and was deposited in a closed basin in a non-marine or brackish marine depositional environment. It is mapped as a unit the Ridge Route Formation, part of the Ridge Basin Group. The cement is calcium carbonate which will effervesce with a drop of dilute hydrochloric acid. These are well-enough cemented that they will withstand student examination.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cb\u003eThe silt grains in these specimens are smaller than those of a sandstone and and feel gritty when rubbed.  It would be instructive to compare this siltstone with one that is cemented with silica, and with a sandstone. \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cspan style=\"color: #ff0000;\"\u003eShipping:\u003c\/span\u003e Priority Mail small flat rate box unless combined with other purchases. \u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e\u003cb\u003eClick \u0026gt;\u003c\/b\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003ca href=\"https:\/\/geologicalspecimensupply.com\/pages\/about-shipping?step=contact_information\" style=\"color: #0000ff;\"\u003e\u003cb\u003e Shipping\u003c\/b\u003e\u003c\/a\u003e\u003c\/span\u003e\u003cb\u003e \u0026lt; for shipping rates. Use back button to return to this page.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003eMaking multiple purchases?\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e Click on the \"combine shipping\" button in the shopping cart. We'll send an invoice with combined shipping. A link in that invoice will bring you back to checkout, no hassle.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e","brand":null,"offers":[{"title":"Default Title","offer_id":10566597187,"sku":"","price":4.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/7650\/products\/siltstone_Ridge_Basin_student.jpg?v=1562650409","url":"https:\/\/geologicalspecimensupply.com\/products\/siltstone-teaching-student-specimens-unit-of-5-specimens","provider":"Geological Specimen Supply","version":"1.0","type":"link"}