Bogdan P Onac
Biographic Data
| ID | 4129229 |
|---|---|
| NAME | Bogdan P Onac |
| GIVEN NAMES | Bogdan P |
| FAMILY NAME | Onac |
| SIGNATURE | ONAC B P |
| AFFILIATIONS | University of South Florida |
| ORCID | 0000-0003-2332-6858 |
| VERIFIED | Yes |
| TOTAL WORKS | 13 |
| TOTAL CITATIONS | 0 |
| WORKS AS AUTHOR | 12 |
| WORKS AS EDITOR | 1 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 0 |
Characterization of phreatic overgrowths on speleothems precipitated in the northern Adriatic during a sea-level stillstand at ca. 2.8 ka
We examined a Late Holocene sea-level stillstand using phreatic overgrowths on speleothems (POS) recovered from Medvjeđa Špilja [Bear Cave] (northern Adriatic Sea) from −1.28 ± 0.15 m below present mean sea level. Different mineralogical analyses were performed to characterize the POS and better understand the mechanisms of their formation. Results reveal that the fibrous overgrowth is formed of calcite and that both the supporting soda straw and…
Hominin Footprints in Caves from Romanian Carpathians
The Romanian karst hosts numerous caves and shelters that over time provided remarkable archaeological and anthropological vestiges. Altogether they show that humans must have entered caves in Romania at least as early as 170,000 years ago. However, ancient human footprints are very rare in the fossil record of East-Central Europe, with only two known locations in the Apuseni Mountains of western Romania. Vârtop Cave site originally preserved thr…
Cave and Karst Systems of Romania
A 2500-Yr late Holocene multi-proxy record of vegetation and hydrologic changes from a cave guano-clay sequence in Sw Romania
We provide sedimentological, geochemical, mineral magnetic, stable carbon isotope, charcoal, and pollen-based evidence from a guano/clay sequence in Gaura cu Muscă Cave (SW Romania), from which we deduced that from ~ 1230 BC to ~ AD 1240 climate oscillated between wet and dry. From ~ 1230 BC to AD 1000 the climate was wetter than the present, prompting flooding of the cave, preventing bats from roosting, and resulting in a slow rate of clay accum…
A Late Glacial paleolake record from an up-dammed river valley in northern Transylvania, Romania
Climate variability and associated vegetation response throughout Central and Eastern Europe (CEE) between 60 and 8 ka
The Campanian Ignimbrite/Y5 tephra layer – A regional stratigraphic marker for Isotope Stage 3 deposits in the Lower Danube region, Romania
Decoding last interglacial sea-level variations in the western Mediterranean using speleothem encrustations from coastal caves in Mallorca and Sardinia
Majorca caves, sea-level changes, and astronomical forcing
Cryogenic carbonates in cave environments
Archives of climate and environmental change in Karst
Younger Dryas to mid-Holocene environmental history of the lowlands of NW Transylvania, Romania
Pollen, micro-charcoal and total carbon analyses on sediments from the Turbuta palaeolake, in the Transylvanian Basin of NW Romania, reveal Younger Dryas to mid-Holocene environmental changes. The chronostratigraphy relies on AMS 14 C measurements on organic matter and U/Th TIMS datings of snail shells. Results indicate the presence of Pinus and Betula open woodlands with small populations of Picea , Ulmus , Alnus and Salix before 12,000 cal yr B…
The First Dated Eemian Lacustrine Deposit in Romania
A complex interglacial sequence of lacustrine sediments has been found near the village of Turbuta in NW Romania. Mollusk, plant macrofossil, and pollen analyses reflect climatic and environmental changes around the last interglacial climatic optimum. U-Th TIMS dating of snails strongly indicates an Eemian age of the organic sediments.
No prominent works on this page.
The First Dated Eemian Lacustrine Deposit in Romania
A complex interglacial sequence of lacustrine sediments has been found near the village of Turbuta in NW Romania. Mollusk, plant macrofossil, and pollen analyses reflect climatic and environmental changes around the last interglacial climatic optimum. U-Th TIMS dating of snails strongly indicates an Eemian age of the organic sediments.
Younger Dryas to mid-Holocene environmental history of the lowlands of NW Transylvania, Romania
Pollen, micro-charcoal and total carbon analyses on sediments from the Turbuta palaeolake, in the Transylvanian Basin of NW Romania, reveal Younger Dryas to mid-Holocene environmental changes. The chronostratigraphy relies on AMS 14 C measurements on organic matter and U/Th TIMS datings of snail shells. Results indicate the presence of Pinus and Betula open woodlands with small populations of Picea , Ulmus , Alnus and Salix before 12,000 cal yr B…
Cryogenic carbonates in cave environments
Archives of climate and environmental change in Karst
Decoding last interglacial sea-level variations in the western Mediterranean using speleothem encrustations from coastal caves in Mallorca and Sardinia
Majorca caves, sea-level changes, and astronomical forcing
The Campanian Ignimbrite/Y5 tephra layer – A regional stratigraphic marker for Isotope Stage 3 deposits in the Lower Danube region, Romania
Climate variability and associated vegetation response throughout Central and Eastern Europe (CEE) between 60 and 8 ka
A 2500-Yr late Holocene multi-proxy record of vegetation and hydrologic changes from a cave guano-clay sequence in Sw Romania
We provide sedimentological, geochemical, mineral magnetic, stable carbon isotope, charcoal, and pollen-based evidence from a guano/clay sequence in Gaura cu Muscă Cave (SW Romania), from which we deduced that from ~ 1230 BC to ~ AD 1240 climate oscillated between wet and dry. From ~ 1230 BC to AD 1000 the climate was wetter than the present, prompting flooding of the cave, preventing bats from roosting, and resulting in a slow rate of clay accum…
A Late Glacial paleolake record from an up-dammed river valley in northern Transylvania, Romania
Cave and Karst Systems of Romania
Hominin Footprints in Caves from Romanian Carpathians
The Romanian karst hosts numerous caves and shelters that over time provided remarkable archaeological and anthropological vestiges. Altogether they show that humans must have entered caves in Romania at least as early as 170,000 years ago. However, ancient human footprints are very rare in the fossil record of East-Central Europe, with only two known locations in the Apuseni Mountains of western Romania. Vârtop Cave site originally preserved thr…
Characterization of phreatic overgrowths on speleothems precipitated in the northern Adriatic during a sea-level stillstand at ca. 2.8 ka
We examined a Late Holocene sea-level stillstand using phreatic overgrowths on speleothems (POS) recovered from Medvjeđa Špilja [Bear Cave] (northern Adriatic Sea) from −1.28 ± 0.15 m below present mean sea level. Different mineralogical analyses were performed to characterize the POS and better understand the mechanisms of their formation. Results reveal that the fibrous overgrowth is formed of calcite and that both the supporting soda straw and…
Geology and Paleoclimatology Research (10 works) · Geography (8 works) · Geology (7 works) · Holocene (7 works) · Archaeology (6 works) · Cave (6 works) · Paleontology (6 works) · Physical geography (6 works) · Geology (5 works) · Marine and environmental studies (5 works)