CONNOR: Good thinking! I read a bit about limestone on the bus journey. Limestone is a sedimentary rock created by layers of skeletons and shells of sea creatures found in ancient, warm ...

Southwestern Ohio's limestone (a sedimentary rock) is saturated with life — life from about 450 million years ago, that is. Our local limestone layers reflect times of relative prosperity for the wide ...

There are generally larger amounts of shale in the lower and upper parts of the Series. Single limestone beds are not continuous layers across the shale, but generally extend only for a few meters to ...

These insects aren’t there for the scenery, but because of the diversity of flowering plants which grow in the limestone. But ...

A shallow sea advances and retreats several times during this period, leaving behind the layers named Kaibab Limestone, Toroweap Formation, and Hermit Shale. The Coconino Sandstone layer was ...

The beginning layers are bound to look a bit wonky ... This textured and translucent paint is created from heated limestone, ...