Fig. 2From: First steps in reconstructing Early Jurassic sea water temperatures in the Andean Basin of northern Chile based on stable isotope analyses of oyster and brachiopod shellsPreparation of the fossil material (modified after Alberti et al. 2012a, 2012b, 2017, 2019). a, b Sections of 5–10 mm thickness were cut from each shell and studied with a cathodoluminescence microscope to select sample areas; c–e Three oyster specimens (CH18-006, CH18-017, and CH18-030) were used for high-resolution stable isotope analysesBack to article page