Geological researches carried out near the Castagnone hamlet in the Cerrina Valley (Northern Monferrato Hills, Piedmont, NW Italy), have brought to light a post-Messinian succession whose sedimentary record starts with a Lower Complex of pedogenized col-luvial materials and with two superimposed Alluvial Units (I and II). The lower one of these units contains a Galerian macrofauna associated with microtine vole teeth (Mimomys savitii, Mimomys piisillus, Unga-romys cf. U. nanus, Microtas (Allophaiomys) sp.), while the upper one yields only scarce faunal remains. Most of this sediments were deposited during a normal palaeomagnetic phase. The I Alluvial Unit, due to its biochronological correlation, must be referred to the Jaramillo Subchron, between 1,070,000 and 990,000 years ago. The II Alluvial Unit, being both unconformable with and younger than the first one, might be best referable to the Brunhes Chron. Overall, the bed dipping across the reported succession shows a progressive syn...
The Castagnone site (Cerrina valley, Monferrato hills, NW Italy): early Pleistocene sedimentary record and biochronology
SALA, Benedetto;
2003
Abstract
Geological researches carried out near the Castagnone hamlet in the Cerrina Valley (Northern Monferrato Hills, Piedmont, NW Italy), have brought to light a post-Messinian succession whose sedimentary record starts with a Lower Complex of pedogenized col-luvial materials and with two superimposed Alluvial Units (I and II). The lower one of these units contains a Galerian macrofauna associated with microtine vole teeth (Mimomys savitii, Mimomys piisillus, Unga-romys cf. U. nanus, Microtas (Allophaiomys) sp.), while the upper one yields only scarce faunal remains. Most of this sediments were deposited during a normal palaeomagnetic phase. The I Alluvial Unit, due to its biochronological correlation, must be referred to the Jaramillo Subchron, between 1,070,000 and 990,000 years ago. The II Alluvial Unit, being both unconformable with and younger than the first one, might be best referable to the Brunhes Chron. Overall, the bed dipping across the reported succession shows a progressive syn...I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
