K-T boundary
noun Etymology: K (alternative for C as abbreviation for Cretaceous) + Tertiary Date: 1983 the transition between the Cretaceous and Tertiary periods of geologic time characterized by a mass extinction of many forms of life including the dinosaurs; also a geologic stratum marking this boundary

New Collegiate Dictionary. 2001.

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  • K–T boundary — The K T boundary is a geological signature, usually a thin band, dated to 65.5 ± 0.3 (mya). [ [http://www.stratigraphy.org/cheu.pdf International commission for Stratigraphy] ] K is the traditional abbreviation for the Cretaceous Period, and T is …   Wikipedia

  • k-t boundary — noun Usage: usually capitalized K&T Etymology: K (alternative for C as abbreviation for Cretaceous) + Tertiary : the transition between the Cretaceous and Tertiary periods of geologic time characterized by a mass extinction of many forms of life… …   Useful english dictionary

  • K/T boundary — noun Geology the boundary between the Cretaceous and Tertiary periods, about 65 million years ago, marked by the extinction of dinosaurs and many other groups of animals. Origin from symbols for Cretaceous and Tertiary …   English new terms dictionary

  • K-T boundary — noun The geological signature of the transition between the Cretaceous period and the Tertiary period 65.5 million years ago.This transition is marked worldwide by a layer of material that contains a high level of Iridium …   Wiktionary

  • K/T boundary — …   Useful english dictionary

  • K-T-Grenze — Dieser Artikel wurde wegen inhaltlicher Mängel auf der Qualitätssicherungsseite des Portals Geowissenschaften eingetragen. Dies geschieht, um die Qualität der Artikel im Themengebiet Geowissenschaften zu steigern. Bitte hilf mit, die Mängel zu… …   Deutsch Wikipedia

  • k-t — ˈkāˈtē adjective Usage: usually capitalized K&T : of, relating to, or occurring at the K T boundary K T extinctions K T sediment …   Useful english dictionary

  • K-T — adjective Date: 1983 of, relating to, or occurring at the K T boundary < K T extinctions > …   New Collegiate Dictionary

  • T. V. S. R. Appa Rao — T.V.S.R. Appa Rao is a scientist from India. He is an Emeritus Scientist with over 40 years of experience in Research Development in the areas of structural analysis design, testing, and failure investigations including those due to natural… …   Wikipedia

  • T. H. Rogers School — Infobox School name = T. H. Rogers School imagesize = caption = motto = Achieving Excellence Through Teamwork established = closed = type = alternative public school affiliation = district = Houston Independent School District grades = K Grade 8 …   Wikipedia

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