Mollusc phylum is one of the most adaptive animal groups on Earth.
They occupy and thrive in incredibly diverse habitats.
being oxidized to limonite (hydrous iron oxides), and also in a few areas the sand content is higher.
"Because of the prior lack of methods for dating rock art, archaeologists had almost completely ignored it before the 1990s," he explained.
Field sampling had found variety of marine mollusc fossils such us 1) Sangiran: Dosinia sp., Telescopium telescopium, Anadara sp., and Dosinia insularum; 2) Patiayam (Ancient Muria Strait): Pseudodon vondenbuschianus, Elongaria orientalis, Conus (Pionoconus) sp., Ampullina bandongensis, Anadara pilula and Filopaludina javanica; 3) Grobogan: Antigona chemnitzii, Cultelus dilatatus, Plotia scabra and Tibia modesta.
Mollusc fossils sample was analysed using Accelerator Mass Spectrometer (AMS) radiocarbon system. The result showed that Sangiran as an ancient deepsea has fossils age 38710 – 31947 years, then Patiayam (Ancient Muria Strait) with fossils age 26248 – 11994.
Evolution places severe demands upon fossils used to support it.
A fossil in an evolutionary sequence must have both the proper morphology (shape) to fit that sequence and an appropriate date to justify its position in that sequence.