A Late Pleistocene (MIS4-MIS2) palaeohydrological reconstruction from Lake Chalco, Basin of Mexico

C. M. Chávez-Lara, S. Lozano-García, B. Ortega-Guerrero, D. Avendaño, M. Caballero-Miranda

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present a palaeohydrological reconstruction of Lake Chalco from 70 to 11.5 ka BP based on ostracod records consisting of three species: Limnocytherina axalapasco, Candona patzcuaro, and Cypridopsis vidua. Overall, the presence of these species helped investigate Lake Chalco water level fluctuations, and thus water salinity variations. Moreover, this work helped improve our knowledge of L. axalapasco and Candona alchichica, two endemic species of Central Mexico, the latter of which was replaced by C. patzcuaro after the cold and dry MIS4. Five ostracod zones reflect the main environmental changes that occurred during the Late Pleistocene. During 70–62 ka BP (Zone 5), shallow and very variable salinity conditions were inferred with a possible occupancy of submerged macrophytes. The Lake Chalco water level increased from 62 to 49 ka BP (Zone 4) and relatively less saline conditions were inferred. The warmer period from of 49–39 ka BP (Zone 3) was characterised by lower lake levels and a gradually increasing salinity. The evaporation rates continued to increase during 39–27 ka BP (Zone 2). However, a higher runoff input helped maintain a relatively high lake level. Later on, cold and dry conditions from 27 to 11.5 ka BP (Zone 1) inhibited the ostracod occupancy in Lake Chalco.

Original languageEnglish (US)
Article number103944
JournalJournal of South American Earth Sciences
Volume119
DOIs
StatePublished - Nov 2022

Bibliographical note

Funding Information:
This research was supported by UNAM DGAPA -PAPIIT IV100215, IN105918 , IN103819 and CONACyT 130963 . CMCL was awarded a scholarship from DGAPA for her postdoctoral research at the Universidad Nacional Autónoma de Mexico. Special thanks to the authorities of the Ejido Tulyehualco for their support and access to the drilling site. Technical assistance was provided by Susana Sosa and Laura Elena Gómez Lizárraga. Suggestions and comments of both reviewers and Editor Francisco J. Vega are gratefully acknowledged.

Funding Information:
This research was supported by UNAM DGAPA-PAPIIT IV100215, IN105918, IN103819 and CONACyT 130963. CMCL was awarded a scholarship from DGAPA for her postdoctoral research at the Universidad Nacional Autónoma de Mexico. Special thanks to the authorities of the Ejido Tulyehualco for their support and access to the drilling site. Technical assistance was provided by Susana Sosa and Laura Elena Gómez Lizárraga. Suggestions and comments of both reviewers and Editor Francisco J. Vega are gratefully acknowledged.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Candona patzcuaro
  • Cypridopsis vidua
  • Lake chalco
  • Limnocytherina axalapasco
  • Ostracods

Continental Scientific Drilling Facility tags

  • CHALCO

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