Molar organic carbon to total nitrogen to organic phosphorus (OC:TN:OP) ratios are used in tandem with carbon isotopic values to constrain sources of organic matter (OM) to marine sediments in a tropical coastal embayment. Analysis of end-members specific to the study site indicates that the bulk OM pool cannot be modeled as a simple mixture of two end-members (terrestrial vs. marine OM), but r...

The archaeological knowledge of the early human occupations of the Pampean Region has improved through the finding of new archaeological sites dated between 10,000 and 11,200 RCYBP (Martínez et al. 2003; Politis 2003). Among them, Paso Otero 5 (Martínez 2001), chronologically located between ca. 10,000 and 10,400 years BP, is characterized by the presence of extinct megamammals and modern speci...

Sta ble light iso tope ra tios (C/C and O/O) in fos sil teeth pro vide key ar chives for un der stand ing ecol ogy of past fau nal com mu ni ties and the evo lu tion of en vi ron ments dur ing the Plio-Pleis to cene. Given the in ev i ta ble pro cesses of diagenesis dur ing fos sili sa tion, the in teg rity of iso to pic in for ma tion and the de gree of de tailed in for ma tion that can be ex ...

We simulate the effects of diagenesis, cementation and compaction on elastic properties shales sandstones with four different petro-elastical theories a basin-evolution model, based constant heating sedimentation rates. consider composed clay minerals, mainly smectite illite, depending burial depth, pore space is assumed to be saturated water at hydrostatic conditions. Diagenesis in shale (smec...