|
Search over 100 encyclopedias and dictionaries: |
Research categories | Follow us on Twitter |
Research categories
View all topics in the newsView all reference sources at Encyclopedia.com |
|||
Dryas
Dryas Part of the characteristic three-fold late-glacial sequence of climatic change and associated deposits following the last (Devensian) ice advance and prior to the onset of the markedly warmer conditions of the current (Flandrian) Interglacial. The type sequence was first described for Allerød in Denmark, and shows upper-and lower-clay deposits rich in remains of Dryas octopetala (mountain avens), and between them deposits of lake mud with remains of cool-temperate flora, e.g. tree birches. The colder Dryas phases mark times of cold, tundra-like conditions throughout what is now temperate Europe. The three-fold Dryas—Allerød—Dryas sequence forms Pollen Zones I, II, and III of the widely accepted late and post-glacial chronology of Europe. The basal, Older, Dryas deposit forms Zone I; the Allerød Zone II; and the Younger Dryas Zone III. In north-western Europe Pollen Zone I is subdivided into a, b, and c. Zone 1b represents a proposed Bølling Interstadial, with Zones 1a and 1c referred to as Oldest and Older Dryas respectively.
|
|
|
Cite this article
AILSA ALLABY and MICHAEL ALLABY. "Dryas." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "Dryas." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O13-Dryas.html AILSA ALLABY and MICHAEL ALLABY. "Dryas." A Dictionary of Earth Sciences. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Dryas.html |
|
Dryas
Dryas Part of the characteristic three-fold late-glacial sequence of climatic change and associated deposits following the last (Devensian) ice advance and prior to the onset of the markedly warmer conditions of the current (Flandrian) interglacial. The type sequence was first described for Allerød in Denmark, and shows upper- and lower-clay deposits rich in remains of Dryas octopetala (mountain avens), and between them deposits of lake mud with remains of cool temperate flora, e.g. tree birches. The colder Dryas phases mark times of cold, tundra-like conditions throughout what is now temperate Europe. The threefold Dryas–Allerød–Dryas sequence forms Pollen Zones I, II, and III of the widely accepted late and post-glacial chronology of Europe. The basal, older Dryas deposit forms Zone I; the Allerød Zone II; and the younger Dryas Zone III. In north-western Europe, Pollen Zone I is subdivided into a, b, and c. Zone 1b represents a proposed Bølling interstadial, with Zones 1a and 1c referred to as Oldest and Older Dryas respectively.
|
|
|
Cite this article
MICHAEL ALLABY. "Dryas." A Dictionary of Ecology. 2004. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "Dryas." A Dictionary of Ecology. 2004. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O14-Dryas.html MICHAEL ALLABY. "Dryas." A Dictionary of Ecology. 2004. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-Dryas.html |
|
Dryas
Dryas Part of the characteristic threefold late-glacial sequence of climatic change and associated deposits following the last (Devensian) ice advance and prior to the onset of the markedly warmer conditions of the current (Flandrian) interglacial. The type sequence was first described for Allerød in Denmark, and shows upper- and lower-clay deposits rich in remains of Dryas octopetala (mountain avens), and between them deposits of lake mud with remains of cool temperate flora, e.g. tree birches. The colder Dryas phases mark times of cold, tundra-like conditions throughout what is now temperate Europe. The threefold Dryad-Allerød-Dryas sequence forms Pollen Zones I, II, and III of the widely accepted late and postglacial chronology of Europe. The basal, older, Dryas deposit forms Zone I; the Allerød Zone II; and the younger Dryas Zone III.
|
|
|
Cite this article
MICHAEL ALLABY. "Dryas." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "Dryas." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O7-Dryas.html MICHAEL ALLABY. "Dryas." A Dictionary of Plant Sciences. 1998. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-Dryas.html |
|
dryas
dryas
•Ananias, bias, Darius, dryas, Elias, eyas, Gaius, hamadryas, Lias, Mathias, pious, Tobias
•joyous • Shavuoth • tempestuous
•spirituous • tortuous • sumptuous
•voluptuous • virtuous • mellifluous
•superfluous • congruous • vacuous
•fatuous • anfractuous • arduous
•ingenuous, strenuous, tenuous
•flexuous • sensuous • impetuous
•contemptuous • incestuous
•assiduous, deciduous
•ambiguous, contiguous, exiguous
•inconspicuous, perspicuous
•promiscuous
•continuous, sinuous
•nocuous • fructuous • tumultuous
•unctuous
•Abbas, shabbos
•choriambus, iambus
•Arbus
•Phoebus, rebus
•gibbous
•cumulonimbus, nimbus
•omnibus • ceteris paribus • Erebus
•rhombus • incubus • succubus
•bulbous • Columbus • syllabus
•colobus • Barnabas • righteous
•rumbustious
|
|
|
Cite this article
"dryas." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "dryas." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O233-dryas.html "dryas." Oxford Dictionary of Rhymes. 2007. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-dryas.html |
|
Search over 100 encyclopedias and dictionaries:
HighBeam™ Research, Inc. © Copyright 2012. All rights reserved.
The Encyclopedia.com advertising network includes:
