The samples used in each investigation came from all over the world. In contrast, recent marine sediment samples were obtained from the Arabian and Black Seas for the third chapter.
The common thread between the three chapters is that the source of organic matter, the rate at which it is delivered to marine sediments and the depositional environment, all set the stage for kerogen formation and eventual petroleum generation. S.)--Joint Program in Oceanography and Oceanographic Engineering (Massachusetts Institute of Technology, Dept.
of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), June 1996.; "May 1996."; Includes bibliographical references (leaves 66-68).
Mollusk shells (clams, oysters) and foraminifera appear to give reliable results, although reworking and burrowing are potential problems.
Analyses of museum specimens collected alive before atmospheric nuclear testing suggest that the standard reservoir correction for marine samples is appropriate for middle to lower Chesapeake Bay.
Along with hydrogen, nitrogen, oxygen, phosphorus, and sulfur, carbon is a building block of biochemical molecules ranging from fats, proteins, and carbohydrates to active substances such as hormones.