Paleoclimatology
Videos
Paleoclimatology is the scientific study of climates predating the invention of meteorological instruments, when no direct, artificial measurement data were available. As instrumental records only spa
Sea floor core sample labelled to identify the exact spot on the sea floor where the sample was taken. Sediments from nearby locations can show significant differences in chemical and biological composition.
Tyrannosaurus Rex Holotype
Land ocean ice cloud hires
Geologic time scale
Videos
The geologic time scale or geological time scale describes how geologic time is divided into standardised intervals. It uses the rock record together with the principles of chronostratigraphy to place
Paleoclimatology
…event. Other major thresholds are the Permian-Triassic, and Ordovician-Silurian extinction events with various reasons suggested. The Quaternary geological period includes the current climate. There has been a cycle of ice ages for the past 2.2–2.1 million years (starting before the Quaternary in the late Neogene…
Sketch of the Succession of Strata and their Relative Altitudes (William Smith)
One example of an obsolete geological time scale (France, mid-1940s).
Marine sandglass MMM