Petrology and geochemistry of volcanic and subvolcanic rocks in the south of Asagi igneous complex, northwest of Zahedan, Sistan Suture Zone [PDF]
پترولوژیIntroductionThe Asagi igneous complex is located in the northwest of Zahedan city (Figure 1A) and is part of a southeast–northwest trending magmatic belt. The igneous rocks of this belt were formed during at least two distinct periods.
Mohammad Bameri +2 more
doaj +1 more source
Oligocene-Miocene calcareous nannofossils in ODP Leg 149 holes [PDF]
, 1996 During Ocean Drilling Program (ODP) Leg 149, five sites were drilled on the Iberia Abyssal Plain in the northeastern Atlantic Ocean. Both Mesozoic and Cenozoic sediments were recovered.
Villa, Giuliana +3 more
core +1 more source
Provenance Response to Rifting and Separation at the Jan Mayen Microcontinent Margin
Geosciences, 2022 The Eocene-Miocene successions recovered at DSDP sites on the Jan Mayen Ridge (NE Atlantic) and on the adjacent East Greenland margin provide a sedimentary record of the rifting and separation of the Jan Mayen Microcontinent from East Greenland.
Andrew Morton +6 more
doaj +1 more source
Antarctic ice sheet and oceanographic response to eccentricity forcing during the early Miocene [PDF]
, 2011 Stable isotope records of benthic foraminifera from ODP Site 1264 in the southeastern Atlantic Ocean are presented which resolve the latest Oligocene to early Miocene (~24–19 Ma) climate changes at high temporal resolution (<3 kyr).
van de Wal, R.S.W. +19 more
core +1 more source
Cementation scenarios for New Zealand Cenozoic nontropical limestones [PDF]
, 1996 Cenozoic limestones are widely distributed in New Zealand, especially in the Oligocene-earliest Miocene in both islands, and the Pliocene-Pleistocene in North Island.
Nelson, Campbell S. +3 more
core +1 more source
Geochemical expression of early diagenesis in middle Eocene-lower Oligocene pelagic sediments in the Southern Labrador Sea, Site 647, ODP Leg 105 [PDF]
, 1989 Geochemical analyses of the middle Eocene through lower Oligocene lithologic Unit IIIC (260-518 meters below sea floor [mbsf]) indicate a relatively constant geochemical composition of the detrital fraction throughout this depositional interval at Ocean ...
Kaminski, M. +11 more
core +1 more source
Oligocene moisture variations as evidenced by an aeolian dust sequence in Inner Mongolia, China
Scientific Reports, 2022 The aridification of Central Asia since the Eocene has widespread evidence, but climate-controlled environmental reorganizations during the Oligocene remain ambiguous.
Joonas Wasiljeff +4 more
doaj +1 more source
Morphological variation in atlas and axis of Neotropical spiny rats (Rodentia, Echimyidae)
The Anatomical Record, EarlyView.Abstract The unique morphologies of the first two cervical vertebrae, the atlas and axis, represent a significant innovation in mammalian evolution. These structures support the weight of the head and enable intricate movements of the head and neck.
Thomas Furtado da Silva Netto +3 more
wiley +1 more source
Acta Palaeobotanica, 2019 The fossil genus Spinopalmoxylon from the Central European Oligocene and Miocene comprises three species: S. daemonorops, S. parvifructum sp. nov. and S. cicatricosum sp. nov. Here the species S.
HEINRICH WINTERSCHEID
doaj +1 more source
Osteohistology of two phorusrhacids reveals uninterrupted growth strategy
The Anatomical Record, EarlyView.Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer +2 more
wiley +1 more source