👉 Microspironympha is a type of microfossils found in sedimentary rock layers, often associated with the Early Cretaceous period (距今约560万年前). These fossils were composed primarily of sand and silt particles, which are typically smaller than bacteria. Microspironympha is characterized by its large size and presence within a sedimentary layer, contributing to the overall understanding of the environmental conditions during this time.
