Search results
Results From The WOW.Com Content Network
The Early Ordovician climate was very hot, [42] with intense greenhouse conditions and sea surface temperatures comparable to those during the Early Eocene Climatic Optimum. [43] Carbon dioxide levels were very high at the Ordovician period's beginning. [44]
The Hirnantian glaciation, also known as the Andean-Saharan glaciation, Early Paleozoic Ice Age (EPIA), [1] the Early Paleozoic Icehouse, [2] the Late Ordovician glaciation, or the end-Ordovician glaciation, occurred during the Paleozoic from approximately 460 Ma to around 420 Ma, during the Late Ordovician and the Silurian period. The major ...
Most scientists believe that this climatic oscillation caused the major extinction event that took place during this time. In fact, the Hirnantian (also known as the End Ordovician and the Ordovician-Silurian) mass extinction event represents the second largest such event in geologic history. Approximately 85% of marine (sea-dwelling) species died.
During the Ordovician Period, a time of significant changes for Earth’s life-forms, plate tectonics and climate, the planet experienced a peak in meteorite strikes.
Cambrian–Ordovician extinction event: 450–440: Ordovician–Silurian extinction event, in two bursts, after cooling perhaps caused by tectonic plate movement 450: Andean-Saharan glaciation: 360–260: Karoo Ice Age: 305: Cooler climate causes Carboniferous rainforest collapse: 251.9: Permian–Triassic extinction event: 199.6
Roughly 4 such cycles have occurred during this time with an approximately 140 million year separation between climate optima. In addition to the present, ice ages have occurred during the Permian-Carboniferous interval and the late Ordovician-early Silurian.
Throughout Earth's climate history (Paleoclimate) its climate has fluctuated between two primary states: greenhouse and icehouse Earth. [1] Both climate states last for millions of years and should not be confused with the much smaller glacial and interglacial periods, which occur as alternating phases within an icehouse period (known as an ice age) and tend to last less than one million years ...
The continent endured an ice age during the Ordovician period and deglaciation was still occurring during the Silurian period. [11] [8] The climate started to become more humid and tropical throughout the globe and there was a lack of seasonality. The climate began to change again during the Mesozoic, this time period was dominated by a very ...