Color values of the lower Pliensbachian Santiurde section (Basque-Cantabrian basin, northern Spain)

  1. Martínez-Braceras, Naroa
  2. Payros, Aitor
  3. Dinarès-Turell, Jaume
  4. Rosales, Idoia
  5. Arostegi, Javier
  6. Silva-Casal, Roi

Editor: PANGAEA

Ano de publicación: 2024

Tipo: Dataset

CC BY 4.0

DOI: 10.1594/PANGAEA.967723 lock_openAcceso aberto editor

Resumo

We present colour dataset from the lowermost Pliensbachian organic-rich hemipelagic Santiurde section (Basque-Cantabrian basin, north Iberian palaeomargin, Spain). The Santiurde section studied herein is exposed at exit 144 of motorway A67 (UTM X411431.091 Y4769002.593), approximately 50 km south-west of Santander city. The 22.5 m-thick succession is characterized by an alternation of limy and marl/shale beds. In order to determine if sedimentation was orbitally forced, a cyclostratigraphic analysis of the hemipelagic rythmites was undertaken. To this end, a total of 373 hand samples were collected and analysed for magnetic susceptibility and rock powder colour. Sampling was mainly carried out in 2019. Rock-powder samples were scanned in a dark room using a desktop office scanner in order to obtain the average colour (RGB value) value using the ImageJ software.