A chronozone or chron is a unit in chronostratigraphy, defined by events such as geomagnetic reversals (magnetozones), or based on the presence of specific...
5 KB (472 words) - 02:58, 2 May 2023
formality Formal Lower boundary definition Base of magnetic polarity chronozone C6Cn.2n FAD of the Planktonic foraminiferan Paragloborotalia kugleri Lower...
25 KB (2,633 words) - 16:29, 10 August 2024
forms the base of nanoplankton biozone NN1), and the base of magnetic chronozone C6Cn.2n. The official GSSP for the Aquitanian Stage lies in the Lemme-Carrosio...
7 KB (565 words) - 22:02, 29 August 2023
formally defined magnetostratigraphically as the base of the Matuyama (C2r) chronozone, isotopic stage 103. Above this point there are notable extinctions of...
45 KB (4,807 words) - 16:02, 10 August 2024
is defined magnetostratigraphically as the base of the Matuyama (C2r) chronozone (at the Gauss-Matuyama magnetostratigraphic boundary), isotopic stage...
8 KB (680 words) - 17:46, 4 January 2024
the Zanclean (and the Pliocene Series) lies with the top of magnetic chronozone Cr3 (about 100,000 years before the Thvera normal subchronozone C3n.4n)...
9 KB (814 words) - 18:36, 21 January 2024
Barremian is determined by the geomagnetic reversal at the start of the M0r chronozone, which is biologically near the first appearance of the ammonite Paradeshayesites...
6 KB (472 words) - 20:35, 28 February 2024
formality Formal Lower boundary definition Base of magnetic polarity chronozone C6Cn.2n FAD of the Planktonic foraminiferan Paragloborotalia kugleri Lower...
97 KB (10,225 words) - 14:10, 10 August 2024
formality Formal Lower boundary definition Base of magnetic polarity chronozone C2r (Matuyama) Extinction of the Haptophytes Discoaster pentaradiatus...
20 KB (2,110 words) - 04:19, 11 August 2024
city of Piacenza. The base of the Piacenzian is at the base of the Gauss chronozone and at the extinction of the planktonic forams Globorotalia margaritae...
13 KB (1,347 words) - 13:29, 12 June 2024
geochronology unit of unspecified rank and is equivalent to a chronostratigraphic chronozone. These correlate with magnetostratigraphic, lithostratigraphic, or biostratigraphic...
172 KB (9,499 words) - 03:27, 5 August 2024
Zealand. The Holocene can be subdivided into five time intervals, or chronozones, based on climatic fluctuations:[needs update?] Preboreal (10 ka–9 ka...
92 KB (9,782 words) - 14:05, 10 August 2024
of foram species Globigerinoides altiaperturus and the top of magnetic chronozone C6An. As of 2016[update], an official GSSP for the Burdigalian had not...
5 KB (395 words) - 00:54, 24 August 2022
the Calabrian hence is defined as: Just above top of magnetic polarity chronozone C2n (Olduvai) and the extinction level of calcareous nannofossil Discoaster...
8 KB (745 words) - 20:00, 7 June 2024
Globorotalia conomiozea and is stratigraphically in the middle of magnetic chronozone C3Br.1r. The Global Boundary Stratotype Section and Point for the Messinian...
8 KB (731 words) - 09:12, 27 June 2023
GSSP ratified 1991 Upper boundary definition Base of magnetic polarity chronozone C6Cn.2n. Near first appearance of the Planktonic foraminiferan Paragloborotalia...
27 KB (2,884 words) - 01:52, 11 August 2024
subquadratus. It is also associated with the short normal polarized magnetic chronozone C5r.2n. A GSSP for the Tortonian has been established in the Monte dei...
8 KB (660 words) - 03:56, 9 August 2024
a reference sequence such as "C". A chron is the time equivalent to a chronozone or a polarity zone. It was called a "polarity subchron" when the interval...
13 KB (1,626 words) - 15:52, 7 December 2023
Celestial body Earth Definition Chronological unit Chron Stratigraphic unit Chronozone Atmospheric and climatic data Mean atmospheric CO2 content c. 235 ppm...
55 KB (4,548 words) - 21:22, 23 July 2024
Thanet. The base of the Thanetian Stage is laid at the base of magnetic chronozone C26n. The references profile (Global Boundary Stratotype Section and Point)...
9 KB (794 words) - 19:55, 19 July 2024
Epoch 34 defined, tens of millions of years Stage Age 99 defined, millions of years Chronozone Chron subdivision of an age, not used by the ICS timescale...
7 KB (744 words) - 21:35, 6 May 2024
GSSP ratified 2000 Upper boundary definition Base of magnetic polarity chronozone C2r (Matuyama) Extinction of the Haptophytes Discoaster pentaradiatus...
54 KB (5,892 words) - 14:09, 10 August 2024
Celestial body Earth Definition Chronological unit Chron Stratigraphic unit Chronozone Atmospheric and climatic data Mean atmospheric CO2 content c. 240 ppm...
100 KB (10,246 words) - 20:13, 2 August 2024
foraminiferan Paragloborotalia kugleri and with the base of magnetic polarity chronozone C6Cn.2n. Oligocene faunal stages from youngest to oldest are: During the...
71 KB (7,912 words) - 14:13, 10 August 2024
polytope Brillouin zone, the primitive cell of a lattice in reciprocal space Chronozone, a sequence of rocks deposited within a particular time interval Erogenous...
6 KB (837 words) - 03:12, 22 July 2024
Epoch 34 defined, tens of millions of years Stage Age 99 defined, millions of years Chronozone Chron subdivision of an age, not used by the ICS timescale...
7 KB (749 words) - 23:38, 5 February 2024
Epoch 34 defined, tens of millions of years Stage Age 99 defined, millions of years Chronozone Chron subdivision of an age, not used by the ICS timescale...
9 KB (1,121 words) - 16:47, 10 May 2024
Look up chron in Wiktionary, the free dictionary. Chron may refer to: Chronozone or chron, a term used for a time interval in chronostratigraphy Polarity...
487 bytes (91 words) - 10:11, 11 November 2020
defined Lower boundary definition candidates Base of magnetic polarity chronozone M0r. Near FAD of the Ammonite Paradeshayesites oglanlensis Lower boundary...
10 KB (821 words) - 20:34, 28 February 2024
was the warmest and moistest Blytt–Sernander period, pollen zone and chronozone of Holocene northern Europe. The climate was generally warmer than today[citation...
14 KB (1,690 words) - 08:59, 30 May 2024