Exercises sedimentary rocks exercises pre-lab exercises answer these questions before looking at the sedimentary rock specimens to that you have mastered the material in the lab. be sure 1. which of the following are terrigenous sedimentary rocks? i draw a circle around them. black shale diatomite oolitic arkose rock gypsum red sandstone chert intraclastic limestone quartz conglomerate lignite bituminous coal limestone graywacke 2. there are three white, fine-grained sedimentary rocks. what distinguishing characteristics might you use to tell them apart? chalk kaolin 3. what is the main difference between shale and claystone? 4·for each of the rock types in the table below, give the name of the dominant mineral, the chemical formula of that mineral, and tell whether or not the mineral or rock) will effervesce (fizz) in hydrochloric acid. mineral name chemical formula reaction to hci rock type limestone dolostone rock gypsum rock salt chert travertine sedimentary