This page will be a slowly growing article or series of articles on the geology, plants, and wildlife of Eureka Springs, Arkansas, and on the trails around town that people can use to get out and experience these things.
These cute little guys are called Plethodon Albagula, or 'Western Slimy Salamanders' (actual name!), and they come out in droves every time it rains in northwest Arkansas. They show very little fear of people, and are under just about every rock or pile of leaves in damp weather. They produce a glue-like slime from their skin as a defense against predators.
Spiriferid Brachiopod from the Mississippian Boone Chert, Eureka Springs, AR. The spiriferida were around from the Early Ordovician, about 480 million years ago, to the Early Jurassic, about 200 million years ago, when they went extinct. This example is from the Osagian to Mississippian, and lived in the warm, shallow inland sea that covered Northwest Arkansas at that time. This example is about --- million years old. Though the spiriferida went extinct, other orders of brachiopods survived, and we see this group represented today among 300 or so known species, mostly living in cold or deep water. Though not descended from them, lamp shells, like the one shown below, are distant living cousins of this group of organisms.
Rocks and fossils
Difference between a rock and mineral. Chert nodules, chert beds, quartz, arenite sandstone, lime stone, oolitic limestone, chert replaced limestone, dolomite replaced limestone, calcite, sphalerite, pyrite, red clay, paleokarst fill, shale, breccia, granular gypsum,