The mass extinction at the end of the Ordovician period was...

The mass extinction at the end of the Ordovician period was probably caused by $a$. the collision of Earth with a large meteorite. b. massive volcanic eruptions. c. massive glaciation on the southern continents and associated climatic changes. $d$. the uniting of all continents to form Pangaea. e. changes in Earth's orbit.

The mass extinction at the end of the Ordovician period was probably caused by
$a$. the collision of Earth with a large meteorite.
b. massive volcanic eruptions.
c. massive glaciation on the southern continents and associated climatic changes.
$d$. the uniting of all continents to form Pangaea.
e. changes in Earth's orbit.

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Key Concepts

Glaciation and Climate Change

Glaciation refers to periods in Earth's history when large-scale ice formation occurs, significantly affecting global climate patterns. In the context of mass extinctions, rapid or extensive glaciation can lead to dramatic climatic changes, such as drops in sea levels and temperature, which can in turn disrupt habitats and trigger widespread species die-offs.

Mass Extinction Events

Mass extinction events are periods in Earth's history when a significant percentage of all living species become extinct over a relatively short geological time span. These events have shaped the evolution of life, often by drastically altering ecosystems and paving the way for new species to emerge.

Ordovician Period

The Ordovician period is a division of the Paleozoic Era characterized by high biodiversity in marine life and significant geological changes. It is notable for its complex ecosystems and later dramatic paleoenvironmental shifts that led to one of the major mass extinction events in Earth's history.

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