Volcanoes Are Generally Not Preserved in the Geologic Rock Record

question 43

Essay

Volcanoes are generally not preserved in the geologic rock record as they are eroded away. However, the various materials erupted from volcanoes are often found preserved in the rock record. How could you infer what type of volcano erupted in a given area based on the type of volcanic deposits now found as layers of rock? Give specific examples and briefly discuss if some materials may be linked to different types of volcanoes.

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Definitions:

Cash Flows

The total amount of money being transferred into and out of a business, particularly in relation to its operating, investing, and financing activities.

Net Income

The ultimate profit of a firm calculated by subtracting all outgoings and taxation from the gross revenue.

FIFO

"First In, First Out," an inventory valuation method where items produced or acquired first are sold, used, or disposed of first.

Periodic Inventory System

An inventory accounting system where updates to inventory levels are made at specific intervals, and cost of goods sold is calculated at the end of an accounting period.