{"product_id":"limestone-oncolitic-limestone-showing-typical-dissolved-surface-found-in-arid-climates-lower-cambrian-chambless-limestone-marble-mountains-calif-hand-display-specimen-copy","title":"limestone - oncolitic limestone  - Lower Cambrian Chambless Limestone, Marble Mountains, Calif. - display specimen","description":"\u003cp\u003e\u003cspan style=\"color: #a10505;\"\u003e\u003cb\u003e\u003cmeta charset=\"utf-8\"\u003eThe Chambless Limestone contains algal oncolites, rounded colonial growths of a cyanobacteria assigned to the catchall genus \u003cem\u003eGirvanella\u003c\/em\u003e. \u003cmeta charset=\"utf-8\"\u003eThe dark gray rounded spots are colonies of \u003cem\u003eGirvanella.\u003c\/em\u003e\u003cbr\u003e\u003cbr\u003eLimestones are cliff-formers in arid regions, forming vista points chosen by countless geology students as a spot to have their lunch. The Madison Limestone in Wyoming, one such rock unit, has been named \"The-seat-of-your-pants-formation\" from the effect of a leisurely lunch consumed with feet dangling over the edge of the cliff - with almost instant tail-end air conditioning. In humid regions, limestones weather to clay and form valleys instead of cliffs. A good question for your students would be to ask, \"Under what type of climate did this form?\"  (arid) and then \"How do you know?\" (the scratchy surface). \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\" style=\"color: #ff2a00;\"\u003e\u003cb\u003eSelect a specimen:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e 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 and silver pen, a black mechanical pencil or one of those plus some number of coins, or you can let us make the selection.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: #ff2a00;\" class=\"s1\"\u003e\u003cb\u003eShipping:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e By Priority Mail or USPS Ground Advantage, whichever is cheaper. Click \u0026gt; \u003c\/b\u003e\u003ca href=\"https:\/\/geologicalspecimensupply.com\/pages\/about-shipping\"\u003e\u003cspan style=\"color: #2b00ff;\" class=\"s2\"\u003e\u003cb\u003ehere\u003c\/b\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cb\u003e \u0026lt; for shipping rates. See comment at \u003c\/b\u003e\u003cspan style=\"color: #ff2a00;\" class=\"s1\"\u003e\u003cb\u003eNote!\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e Use back button to return to this page.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: #ff2a00;\" class=\"s1\"\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\/p\u003e","brand":"Geological Specimen Supply","offers":[{"title":"Default Title","offer_id":43934408671319,"sku":null,"price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/7650\/files\/limestoneoncoliticD15pcl.jpg?v=1781037126","url":"https:\/\/geologicalspecimensupply.com\/products\/limestone-oncolitic-limestone-showing-typical-dissolved-surface-found-in-arid-climates-lower-cambrian-chambless-limestone-marble-mountains-calif-hand-display-specimen-copy","provider":"Geological Specimen Supply","version":"1.0","type":"link"}