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Historical geology or palaeogeology is a discipline that uses the principles and methods of geology to reconstruct the geological history of Earth. [1] Historical geology examines the vastness of geologic time, measured in billions of years, and investigates changes in the Earth , gradual and sudden, over this deep time .
Paleontology (/ ˌ p eɪ l i ɒ n ˈ t ɒ l ə dʒ i, ˌ p æ l i-,-ən-/ PAY-lee-on-TOL-ə-jee, PAL-ee-, -ən-), also spelled palaeontology [a] or palæontology, is the scientific study of life that existed prior to the start of the Holocene epoch (roughly 11,700 years before present).
As computer-based cladistics matured in the 1990s, paleontologists were among the first zoologists to broadly adopt the system. [3] Progressive scrutiny and work upon dinosaurian interrelationships, with the aid of new discoveries that have shed light on previously uncertain relationships between taxa, have begun to yield a stabilizing ...
"The Global Boundary Stratotype Section and Point (GSSP): overview". stratigraphy.org. Archived from the original on 2009-01-13. "Chart of The Global Boundary Stratotype Sections and Points (GSSP): chart". stratigraphy.science.purdue.edu. Archived from the original on 2022-06-30. "GSSP Table - All Periods". timescalefoundation.org.
The Treatise on Invertebrate Paleontology (or TIP) published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and extant (still living) invertebrate animals.
The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [17] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.
In 2003, PRI opened the Museum of the Earth, an 18,000-square-foot (1,700 m 2) facility that showcases PRI's collections on a journey through 4.5 billion years of history. [5] Attracting approximately 30,000 visitors a year, [ 4 ] the museum's displays include fossils, glaciers , coral reef aquaria , and the skeletons of a right whale and ...
438.6 ± 1.1 * Aeronian: 440.5 ± 1.2 * Rhuddanian: 443.1 ± 1.5 * Ordovician: Upper/Late: Hirnantian: The Great Ordovician Biodiversification Event occurs as plankton increase in number: invertebrates diversify into many new types (especially brachiopods and molluscs; e.g. long straight-shelled cephalopods like the long lasting and diverse ...