👉 Lomentaceous is a term used in the field of paleontology to describe fossils that are composed primarily of calcium carbonate, known as limestone. These types of fossils are typically found in rock layers, and they can vary in thickness and size depending on their age. In the context of lometaceous fossils, "loment" refers to the calcium carbonate content in these fossils, which is often associated with the time period when those fossils were formed. The term "catastrophically old,"