Long-Term
Changes in Geology & Life
In this guide we are viewing changes that occur over years, decades, centuries, & longer.
Video Overview
Watch this guide overview video.
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Long-Term Lecture Guide Contents
This guide and lecture material are assessed on the weekly quiz.
Long-Term Objectives
Geologic Time
Define stratigraphy and explain how layers of rocks can provide information; define geochronology, including what is used to date fossil rocks; and describe the types of fossils found in Oregon coastal areas, as well as the history of significant freshwater ecosystems.
Streams
Describe how stream orders are calculated as streams increase in size; link stream order to levels of photosynthesis; and explain how streams can change over time, including the characteristics and impact of beavers.
Lakes
Classify lakes based on productivity and identify three different lake zones; and identify microscopic and macroscopic photosynthetic pond organisms.
Wetlands
Provide examples of different types of wetlands; describe various wetland functions including why it is challenging to rebuild a wetland; and list characteristics of amphibian species including frogs.
