👉 Tephrits are a type of fossilized plant material that is composed primarily of calcium carbonate. They are often found in the sedimentary layers of various geological formations, including sandstone, limestone, and shale. Tephrits can be classified into different types based on their chemical composition and mineralogy, such as dolerite, kaolin, and quartz tephrites, among others. Tephritis is commonly used in scientific research to study the evolution of plant life forms over time