The tapeats sandstone is made of sand-sized rock pieces and contains fossils of trilobites. trilobites were marine organisms similar to modern-day horseshoe crabs. in which kind of environment did the tapeats sandstone most likely form and why? geologic history unit assessment, part 2 a lake environment because trilobites live in the fresh water and there are small sediments in the rocks
a. a beach environment because trilobites live in the ocean and there are sand particles in the rocks
b. a coral reef environment because the particles in t