Kerogen is solid, insoluble organic matter in sedimentary rocks. It consists of a variety of organic materials, including dead plants, algae, and other microorganisms, that have been compressed and heated by geological processes. All the kerogen on earth is estimated to contain 1016 tons of carbon. This makes it the most abundant source of organic compounds on earth, exceeding the total organic content of living matter 10,000-fold.
Kerogen can be found in oil shale
Alexander Crum Brown FRSE FRS was a Scottish organic chemist. Alexander Crum Brown Road in Edinburgh's King's Buildings complex is named after him.
Alexander Crum Brown
Alexander Crum Brown c. 1900
Belgrave Crescent, Edinburgh
Alexander Crum Brown's grave, Dean Cemetery