File:Mississipian Limestone Mackay Blaze Canyon (23657287346).jpg - Wikipedia

Origin of limestone–marlstone cycles: Astronomic forcing of organic-rich sedimentary rocks from the Cenomanian to early Coniacian of the Cretaceous Western Interior Seaway, USA - ScienceDirect

File:Partially devitrified rhyolitic obsidian (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 1 (31863607667).jpg - Wikimedia Commons

Geomorphic history of Lake Manix, Mojave Desert, California: Evolution of a complex terminal lake basin - ScienceDirect

Limestone - Wikipedia

Resolving time-space histories of Late Cenozoic bedrock incision along the Upper Colorado River, USA - ScienceDirect

Limestone - Simple English Wikipedia, the free encyclopedia

Darin McQuoid Photography

KGS--Franklin County Geology--Pennsylvanian, Missourian

KGS--Bull. 206, part 1--Carbonate Facies of the Swope Limestone Formation, Southeast Kansas

File:Provo Canyon syncline.jpg - Wikipedia

KGS--Franklin County Geology--Pennsylvanian, Missourian

KGS--Bull. 206, part 1--Carbonate Facies of the Swope Limestone Formation, Southeast Kansas