This would include both inorganic and organic. Then, the two tests would be compared. By subtracting the amount of inorganic from the total amount, the amount of organic carbon would be determined. It displayed no growth rings. Growth rings in trees and other plants are caused by a variation in the water supply to the plant.
Annual rings occur when the temperature drops and the sap in the tree fails to rise.
The leaves of the deciduous trees turn color and die, soon dropping off. Even though there may be water in the ground, when the temperature drops, the tree does not continue its cycle until it is again spring. Therefore, a ring results when the growth is temporarily halted and begins when spring arrives. In order to understand why the pre-flood wood showed no growth rings one needs only to consult the Bible. Growth was at a constant rate.