we could not recover sediment cores from proposed Site RSCR-19A, which was targeted to obtain a high-fidelity, continuous record of upper Neogene and Quaternary pelagic/hemipelagic sedimentation. Despite our failure to recover a shelf-to-rise transect for the Miocene, a continental shelf-to-rise transect for the Pliocene to Pleistocene interval is possible through comparison of the highquality records from Site U1522 with those from Site U1525 and legacy cores from the Antarctic Geological Drilling Project (AN-DRILL).
No abstract
A diverse assemblage of marine inicroplankton was recovered from lower Mioccne and Quaternary strata from the Cape Roberts Project drillhole. CRP-1. McMurdo Sound. This is the first diverse assemblage of marine palynomorphs of Miocene age rccovcred from the Antarctic continent. As well as foraminiferal linings and arthropod1 annelid parts. the in situ marine palynomorph assemblage can be subdivided into three groups: prasinophyte algae, acritarchs anddinoflagellate cysts (dinocysts). The prasinophyte algae are the most diverse and abundant: nine species are recognised. leiosphaerids and cyma[iosphaerids dominate. Seven species of acritarchs have been identified and arc dominated by Sigmopollis sp. and an unknown form referred to here as Acritarch 1. In situ dinocysts make up a sparse but moderately diverse group of nine species. Their greatest abundance and diversity occurs below 39.06 mbsf in the lower Miocene part of the section. It is suspected that most dinocysts recovered from above this level are a result of reworking. Almost all the in situ species are new. The prasinophytes and acritarchs are listed in open nomenclature pending more detailed investigations. whereas most new species of dinoeysts are described forn~ally. Several species of reworked dinocysts were recorded dominantly from lower Miocene strata.
A diverse assemblage of marine inicroplankton was recovered from lower Mioccne and Quaternary strata from the Cape Roberts Project drillhole. CRP-1. McMurdo Sound. This is the first diverse assemblage of marine palynomorphs of Miocene age rccovcred from the Antarctic continent. As well as foraminiferal linings and arthropod1 annelid parts. the in situ marine palynomorph assemblage can be subdivided into three groups: prasinophyte algae, acritarchs anddinoflagellate cysts (dinocysts). The prasinophyte algae are the most diverse and abundant: nine species are recognised. leiosphaerids and cyma[iosphaerids dominate. Seven species of acritarchs have been identified and arc dominated by Sigmopollis sp. and an unknown form referred to here as Acritarch 1. In situ dinocysts make up a sparse but moderately diverse group of nine species. Their greatest abundance and diversity occurs below 39.06 mbsf in the lower Miocene part of the section. It is suspected that most dinocysts recovered from above this level are a result of reworking. Almost all the in situ species are new. The prasinophytes and acritarchs are listed in open nomenclature pending more detailed investigations. whereas most new species of dinoeysts are described forn~ally. Several species of reworked dinocysts were recorded dominantly from lower Miocene strata.
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