Notwithstanding the remarkable information that could be
obtained from the organic residues preserved in geological samples,
few authors have studied the presence of organic compounds
within the beachrock cements. Although Olcott Marshall et al. [16]
determined biomarkers in other matrices such as Precambrian glacial
sediments by means of an accelerated microwave extraction
obtaining very promising results, there is a lack of analytical
methodologies developed to determine organic biomarkers in beachrock
samples. Moreover, most of the works dealing with the
analysis of such organic compounds in similar matrices like sediments,
sands, soils and rocks often use very time consuming
extraction techniques. In this framework, conventional Soxhlet
extraction is the most referenced technique in this area