Lab 4: sedimentary rocks extension 1. how old are the oldest reported sedimentary rocks? 2. what is the difference between sediment and sedimentary rocks? hint: define both. 3. explain uniformitarianism: 4. there are two primary types of sedimentary rocks. complete the table below with information about these two types: type how does it form? how is it classified? 5. you find two deposits of sediment out on your hike. deposit a consists of well-rounded sand, containing mostly pure quartz deposit b contains angular, gravel-sized rock particles. what can you tell about the erosional history of the two different sediment deposits? explain/support your answer in terms of rounding and sorting.