In this section,a lower limestone is successively overlain by lagoon mudstone and a beach sandstone.What is the best interpretation of what was going on? 
Definitions:
World Economy
The global network of economic activities including trade, production, and financial transactions that take place across the world.
American Value System
A set of beliefs and ideals that are widely held by Americans, including liberty, democracy, individualism, and equality.
1920s
A decade characterized by economic prosperity, cultural flourishing in the West, and significant social changes, often referred to as the "Roaring Twenties."
Change
The process or act of making or becoming different, marking a transition from one state, phase, subject, or place to another.
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