How can the geology of Arkansas be described?

Metamorphic rocks have been altered in the solid state from some pre-existing condition in response to significant changes in temperature, pressure, or chemical environment. Sedimentary rocks are composed of particles of sediment, which are derived by the weathering and/or the erosion of pre-existing rock. read more

Last week, a new species of dinosaur was described in the Journal of Vertebrate Paleontology. The dinosaur, Arkansaurus fridayi, is an ornithomimosaur the Early Cretaceous of Arkansas, and represents the first dinosaur to be described from that state. read more

In the Ouachita Mountains of Arkansas, the layers, or strata, of the rocks have been so corrugated and convoluted, that interpretation of events causing these deformations cause considerable debate among geologists. In other parts of the state, like north Arkansas, nice nearly horizontal layers of rocks can be seen to extend miles across counties. read more