Which of the Following Is Not a Common Cementing Agent

What do orange red or brown colours indicate in sedimentary rocks? A)original deposition on a beach B)deposition below water in a swamp or muddy estuary C)an oxidizing environment to produce iron (ferric)oxides or hydroxides D)high organic matter contents

What do dense crystalline rocks and shales have in common? A)The are both deposited in fresh water rivers and lakes. B)They are usually made out of sediment sized rock fragments. C)They both have low porosity and will be impermeable to oil or water. D)They are both too stupid to pass a geology test!