dor_id: 4132686

506.#.#.a: Público

590.#.#.d: Los artículos enviados a la revista "Geofísica Internacional", se juzgan por medio de un proceso de revisión por pares

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT); Scientific Electronic Library Online (SciELO); SCOPUS, Dialnet, Directory of Open Access Journals (DOAJ); Geobase

561.#.#.u: https://www.geofisica.unam.mx/

650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

336.#.#.b: article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: https://revistas.unam.mx/catalogo/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: https://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1272/1256

100.1.#.a: Urrutia-fucugauchi, J.; Lozano-garcía, S.; Caballero-miranda, M.

524.#.#.a: Urrutia-fucugauchi, J., et al. (1995). Palaeomagnetic and palaeoenvironmental studies in the southern basin of Mexico - II Late Pleistocene - Holocene Chalco lacustrine record. Geofísica Internacional; Vol. 34 Núm. 1: Enero 1, 1995; 33-53. Recuperado de https://repositorio.unam.mx/contenidos/4132686

245.1.0.a: Palaeomagnetic and palaeoenvironmental studies in the southern basin of Mexico - II Late Pleistocene - Holocene Chalco lacustrine record

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1995

264.#.1.c: 1995-01-01

653.#.#.a: Paleoambientes; paleoecología; paleoclimatología; paleomagnetismo; Lago de Chalco; palinología; diatomeas; Palaeoenvironments; palaeoecology; palaeoclimatology; Chalco Lake; Basin of Mexico; palaeomagnetism; palynology; diatoms

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1272

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/1272

041.#.7.h: spa

520.3.#.a: Results of a detailed palaeomagnetic and microfossil study of the first twelve and eigth meters, respectively, of the lacustrine sedimentary sequence from Chalco Lake, southem Basin of Mexico are reported. The study is based on four cores recovered from the central part of the lake. Radiocarbon dating indicates an age for the bottom of the section (12 m) of about 25,000 yr B.P. Sediments are characterized by high magnetic susceptibility values, related to the intensive and widespread volcanic and tectonic activity in and around the lake. The palaeoflora was mainly constituted by coniferous forests in the highlands and swamp vegetation closer to the lake. Palaeolimnological data document fluctuations in lake levels, with changes in salinity and alkalinity. Diminution or absence of palaeofossil populations in the sequence show a correlation with the tephra (as indicated by high magnetic susceptibilities and remanence intensities). Volcanic activity affects microfossil abundance and distribution both directly (tephra fallout in the lake arca) and indirectly (e.g., through enhanced erosion, tectonism and hydrothermal alteration). The characteristic declination shows severa! anomalies; large swings are observed at 5,000 and 14,000 yr B.P. The inclination varíes around a mean value of 32.9°, with an apparent cyclic pattem. There are no large swings in the inclination data as compared with the declination, but the inclination anomaly shows a peak at about 14,000 yr B.P. that correlates with the declination swing. Intensity data show periodicities from 650 to 2,900 yr. Declination data show similar dominant periods in the order of 850 to 2,900 yr. lnclination data present periodicities in the range from 1,000 to 3,800 yr.

773.1.#.t: Geofísica Internacional; Vol. 34 Núm. 1: Enero 1, 1995; 33-53

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

310.#.#.a: Trimestral

300.#.#.a: Páginas: 33-53

264.#.1.b: Instituto de Geofísica, UNAM

doi: https://doi.org/10.22201/igeof.00167169p.1995.34.1.1272

handle: 00dcc4599365c053

harvesting_date: 2023-06-20 16:00:00.0

856.#.0.q: application/pdf

file_creation_date: 2022-07-29 08:26:12.0

file_modification_date: 2022-07-29 16:27:50.0

file_creator: J. Urrutia-Fucugauchi

file_name: b5ce674846dcf4a9ef8be8dfcb5eef92319a956ef948cb0d8b2b992526bc8177.pdf

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245.1.0.b: Palaeomagnetic and palaeoenvironmental studies in the southern basin of Mexico - II Late Pleistocene - Holocene Chalco lacustrine record

last_modified: 2023-06-20 16:00:00

license_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es

license_type: by-nc-sa

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