From: The sedimentary dynamics of Sabellaria alveolata bioconstructions (Ostia, Tyrrhenian Sea, central Italy)
Sand source
Grain size
Tube and/or intertube
About 200 μm (D50 tube = D50 intertube)
Beach sub-environment
Between 311 μm and 499 μm
Disaggregated bioconstruction fragments
Between 241 μm and 332 μm