The Late Ordovician mass extinction (LOME), sometimes known as the end-Ordovician mass extinction or the Ordovician–Silurian extinction, is the first of the "big five" major mass extinction events in …

This mass extinction event caused about 20 percent of marine families and some 76 percent of all extant species to die out, possibly within a span of about 10,000 years, thus opening up numerous …

Dec 18, 2023 · The Late Ordovician Mass Extinction was the earliest of the ‘big’ five extinction events and the earliest to affect the trajectory of metazoan life. Two phases have been identified near the …

Feb 28, 2025 · The End-Ordovician extinction occurred approximately 444 million years ago and was the first mass extinction event that is well documented in the fossil record.

Jan 9, 2026 · Now called the Late Ordovician mass extinction (LOME), Earth’s first major mass extinction wiped out about 85 percent of all marine species as the ocean chemistry radically changed …

Jan 11, 2026 · A rapid climate collapse during the Late Ordovician Mass Extinction devastated ocean life and reshuffled Earth’s ecosystems. In the aftermath, jawed vertebrates gained an unexpected edge …

The Late Ordovician Mass Extinction was the earliest of the ‘big’ five extinction events and the earliest to affect the trajectory of metazoan life. Two phases have been identified near the...

5 days ago · A mass extinction is a rapid, widespread decrease in Earth’s biodiversity, resulting in the loss of a large percentage of species within a short period. This crisis is distinct from background …

May 26, 2025 · Long before that – like, almost 400 million years before – the world was already testing out its appetite for apocalypse with a little-known event called the Late Ordovician mass extinction.

Sep 1, 2023 · The Late Ordovician mass extinction event is the oldest of the five great extinction events in the fossil record. It has long been regarded as an outlier among mass extinctions, primarily due to …