Citation:

PANGAEA.982951

Name: Gray value determination from sediment core of Lake Alchichica in Mexico
Published: 2026-01-23
License: https://creativecommons.org/licenses/by/4.0/
Keywords: carbon isotope; Deuterium Isotopes; leaf waxes; Mexico; oxygen isotope; Pollen; Sediment core; XRD; XRF core scanner data

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2026-01-23 • DOI registered: 2026-02-21

RIS Citation BibTeX Citation Text Citation ShareShow Map Google Earth

Abstract:

The grey values were measured from a 57-cm-long sediment core retrieved from Lake Alchichica (19° 24' 38 N, 97° 24' 14 W, 2322 masl) at a water depth of ~ 60 m using a Uwitec® coring device equipped with a 9-cm coring tube. The core structure was revealed by a Siemens Somatom Definition +128 CT-scanner at the INRS Centre Eau Terre Environnement with a 0.31 mm resolution in the stratigraphic direction. Grey levels are expressed in Hounsfield units (HU): light (dark) grey levels represent dense (light) sediments. The analysis was performed at the INRS Centre Eau Terre Environnement in Canada.

Keyword(s):

carbon isotope; Deuterium Isotopes; leaf waxes; Mexico; oxygen isotope; Pollen; Sediment core; XRD; XRF core scanner data

Supplement to:

Israde-Alcántara, Isabel; Safaierad, Reza; Rantala, Marttiina V; Domínguez-Vázquez, Gabriela; Mohtadi, Mahyar; Schefuß, Enno; Tylmann, Wojciech; Francus, Pierre; Mattielli, Nadine; Metcalfe, Sarah; Fagel, Nathalie (2025): Late Holocene hydroclimate variability and human–environment interactions in the Cuenca Oriental, Mexico: multiproxy evidence from Lake Alchichica. Quaternary Science Reviews, 369, 109618, https://doi.org/10.1016/j.quascirev.2025.109618

Funding:

Fonds de la Recherche Scientifique (FNRS), grant/award no. PDR T.0079.21: Holocene Mexican Crater Lakes and Climate (HolMeCl)

Coverage:

Latitude: 19.505600 * Longitude: -97.438900

Minimum DEPTH, sediment/rock: 0.0000 m * Maximum DEPTH, sediment/rock: 0.5700 m

Event(s):

Lake_Alchichica * Latitude: 19.505600 * Longitude: -97.438900 * Elevation: 2322.0 m * Lake water depth: 60 m * Penetration: 0.57 m * Method/Device: Sediment corer, UWITEC * Comment: Uwitec® coring device equipped with a 9-cm coring tube.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Safaierad, Reza		Geocode
2	Grey value	Grey	HU	Safaierad, Reza

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1848 data points

Download Data

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML