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What is the name of the first major transgression onto the North American craton,and when did it begin?
Blood
A body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away.
pH
A scale measuring the acidity or alkalinity of a solution, where 7 is neutral, values below 7 are acidic, and values above 7 are alkaline.
Buffers
Substances that minimize changes in the pH of a solution by absorbing or releasing hydrogen ions.
pH
A logarithmic scale used to specify the acidity or basicity of an aqueous solution, ranging from 0 (very acidic) to 14 (very basic) with 7 being neutral.
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