👉 The term "laterigrade" is a geological term that refers to rocks that are formed during the Late Triassic period, between 259 and 234 million years ago. These rocks are characterized by high levels of silica and quartz content, which makes them extremely hard and resistant to mechanical stress. They are typically found in sedimentary rock formations such as sandstone and limestone. Laterigrade rocks are often associated with marine environments due to their ability to form during periods of intense