dor_id: 4133096

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/1215/1149

100.1.#.a: Lozano García, Socorro

524.#.#.a: Lozano García, Socorro (1989). Palinologia y paleoambientes pleistocénicos de la Cuenca de México. Geofísica Internacional; Vol. 28 Núm. 2: Abril 1, 1989; 335-362. Recuperado de https://repositorio.unam.mx/contenidos/4133096

245.1.0.a: Palinologia y paleoambientes pleistocénicos de la Cuenca de México

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

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1989

264.#.1.c: 1989-04-01

653.#.#.a: Palinología; Paleoambientes; Pleistoceno; Cuenca de México; Palynology; Paleoenvironments; Pleistocene; Basin of Mexico

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/1215

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/1215

041.#.7.h: spa

520.3.#.a: This palynological study is based on an 80 m core at Texcoco Lake. The aim of this work is to establish the palynoestratigraphy by mean s of the paleoecologic and paleoclimatic analysis. The changes observed through the palynological analysis are supported by the geochemical changes recorded in the lacustrine sediments. The palynoestratigraphic sequen ce is explained in temlS of the climatic variations as well as a result of the volcanic activity that caused alterations of soil and vegetation. Based on the lithostratigraphic correlation and taking into account the sedimentation rate, the lacustrine clays of the core are encompassed between Middle and Upper Pleistocene. Three zones are established, according to the palynological content and the geochemical characteristics of the sediments. Zone A (Upper Middle Pleistocene) dominated by pine and oak pollen and cloud forest pollen is also presento This assemblage seems to indicate that the climate was humid-temperate. The paleolimnological evidence exhibit the existenee of a fresh-water lake during this periodo Zone B (Upper Middle-Pleistocene) presents important variations in the palynological content, with prevalen ce of pollen from herbaceous communities; there are signals of an important cooling correlated with the Tomicoxco glaciation. There is a great contribution of allochthonous detritic material and the values of Na and K rise. Thereis also a considerable in crease of the magnetic susceptibility and an important lowering of the lake leve. Towards  the end of this zone the lake leve! in creases. the woodlands are restablished and the herbaceous communities retract. Zone C (Upper Pleistocene) is characterized by the prevalen ce of arboreal pollen (Pinus, Quercus, Alnus). Paleoclimatic fluctuations are observed. In the wet stages, pollen of cloud forest is registered and in less humidstages woodlands of pine and oak prevail. In general, there is a moderate but progressive tendency towards aridity. The lake becomes progressively brackish, possibly due to a combination of hydrothermalism and a dryer climate.doi: https://doi.org/10.22201/igeof.00167169p.1989.28.2.1034

773.1.#.t: Geofísica Internacional; Vol. 28 Núm. 2: Abril 1, 1989; 335-362

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: 335-362

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

doi: https://doi.org/10.22201/igeof.00167169p.1989.28.2.1034

handle: 00ca1cb12c3be9bb

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

856.#.0.q: application/pdf

file_creation_date: 2008-05-22 18:24:09.0

file_modification_date: 2022-07-28 15:40:38.0

file_creator: S. Lozano García

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245.1.0.b: Palinologia y paleoambientes pleistocénicos de la Cuenca de México

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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