Sentence examples for by three depositional phases from inspiring English sources
The clinoformal geometry of the units defines Fan 3 as a prograding fan characterized by three depositional phases.
Weathering indices and iron fractionation data indicate slight differences in soil development between the paleosols on terminal moraines and associated terraces of two different ages in the central part of the region, suggesting that the two depositional phases were separated by an interstadial rather than an interglacial.
Six eolian depositional phases are identified spanning the past 50 ka, interposed with paleosols and/or bounded by erosive surfaces.
The latest two eolian depositional phases, occurred at ca. 190 and 70 yr ago, during the historic period with European settlement and are related to anthropogenic landscape disturbance, though the youngest phase was concomitant with 1930s drought.
Two rift-related depositional phases are recognised separated by a phase of uplift between S3 and S4.
The soils and landscape are characterised by multiple volcanic depositional phases for the last about 50 ka in the Sila mountains and about 70 ka or more in the Nebrodi mountains.
Using this and other published data coupled with a better understanding of Late Quaternary sea-level fluctuations and palaeocoastline configurations, it is concluded that these depositional phases appear to be controlled by interglacial and subsequent interstadial sea-level high stands.
These system tracts make up three depositional sequences.
Three depositional sequences (DS1 to DS3) of late Burdigalian to early Serravallian age have been identified, which are separated by erosional unconformities.
Three depositional systems can be differentiated (Figure 2) according to their palaeogeographic position and the source area of the terrigenous sediments [22], [23].
