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111 results for “Late Quaternary”
FIG. 14 in Late Quaternary Fossil Mammals From The Cayman Islands, West Indies
FIG. 14. Capromys pilorides hemimandibles in labial and lingual view. A, Capromys pilorides pilorides NHM (Mammalogy) 77.429 (Cuba); B, Capromys pilorides lewisi UF 22881 (Old Man Cave, Grand Cayman); C, Capromys pilorides lewisi NHM (Palaeontology) M42029 (Stake Bay Cave, Cayman Brac); D, Capromys pilorides lewisi NHM (Mammalogy) 71.1558/M15706 (Stake Bay Cave, Cayman Brac).
FIG. 21 in Late Quaternary Fossil Mammals From The Cayman Islands, West Indies
FIG. 21. Geocapromys caymanensis UF 21398 (Patton's Fissure, Cayman Brac), palate in occlusal view (stereopair).
FIG. 20 in Late Quaternary Fossil Mammals From The Cayman Islands, West Indies
FIG. 20. Geocapromys caymanensis, skulls in lateral view. A, UF 172756 (Hutia Cave, Cayman Brac); B, UF 172544 (Furtherland Farms Cow Well, Grand Cayman); C, holotype, UF 21388 (Patton's Fissure, Cayman Brac).
FIG. 24 in Late Quaternary Fossil Mammals From The Cayman Islands, West Indies
FIG. 24. Geocapromys caymanensis, right hemimandibles in occlusal view (stereopairs). A, UF 61079 (Patton's Fissure, Cayman Brac); B, UF 172932 (Dolphin Cave, Grand Cayman).
FIG. 13 in Late Quaternary Fossil Mammals From The Cayman Islands, West Indies
FIG. 13. Capromys pilorides pilorides skulls from Cuba in lateral view, showing variation in inflation of posterior frontals. A, NHM (Mammalogy) 742.a/555.4.286; B, NHM (Mammalogy) 77.429.
FIG. 17 in Late Quaternary Fossil Mammals From The Cayman Islands, West Indies
FIG. 17. Capromys pilorides lewisi UF 18647 (Patton's Fissure, Cayman Brac), left hemimandible in occlusal view (stereopair).
FIG. 16 in Late Quaternary Fossil Mammals From The Cayman Islands, West Indies
FIG. 16. Capromys pilorides hemimandibles in occlusal view. A, Capromys pilorides lewisi UF 172820 (Chisholm Cow Well, Grand Cayman) (image reversed); B, Capromys pilorides lewisi UF 22881 (Old Man Cave, Grand Cayman); C, Capromys pilorides lewisi NHM (Mammalogy) 71.1558/unnumbered (Stake Bay Cave, Cayman Brac); D, Capromys pilorides lewisi NHM (Palaeontology) M42029 (Stake Bay Cave, Cayman Brac); E, Capromys pilorides pilorides NHM (Mammalogy) 77.429 (Cuba).
Figure 6 in Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
Figure 6. Diprotodonts from the Broken River karst area. (A) Petaurus norfolcensis upper molar (UQPL19); (B) Trichosurus sp. upper molar (UQPL20); (C)?hypsiprymnodontid premolar (UQPL21); (D) juvenile macropodid mandible (UQPL22). Scale bars = 1 mm.
Figure 2 in Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
Figure 2. Images of the karst, study caves, and fossils of the Broken River karst area. (A) rillenkarren typical of the Broken River limestone karst; (B) Beehive fossil deposit (arrow indicating fossil-bearing breccia); (C) Big Ho fossil deposit (arrow indicating fossil-bearing breccia exposed as a false floor); (D) partially acid-digested breccia from Beehive showing high concentration of vertebrate fossils.
Figure 3 in Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
Figure 3. Rarefaction curves comparing Big Ho and Beehive mammalian diversity within respective fossil breccias.
Figure 5 in Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
Figure 5. Dasyurids and bandicoots of the Broken River karst area. (A) Dasyurus lower molar (UQPL10); (B) Antechinus sp. dentary (UQPL11); (C) Phascogale tapoatafa lower molar (UQPL12); (D) Planigale sp. cf. P. ingrami / tenuirostris dentary (UQPL13); (E) Sminthopsis macroura dentary (UQPL14); (F) Sminthopsis sp. cf. S. murina dentary (UQPL15); (G) Chaeropus yirratji maxilla (QMF58987); (H) Isoodon sp. lower molar (UQPL17); (I) Isoodon peninsulae mandible (UQPL16); (J) Perameles sp. upper molar (UQPL18). Scale bars = 1 mm.
Figure 7 in Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
Figure 7. Placentals from the Broken River karst area. (A) Conilurus albipes maxilla (UQPL23); (B) Conilurus capricornensis molar fragment (UQPL24); (C) Leggadina forresti maxilla (UQPL25); (D) Notomys longicaudatus maxilla (UQPL26); (E) Notomys sp. 2 maxilla (UQPL27); (F) Pseudomys australis maxilla (UQPL28); (G) Pseudomys sp. cf. P. delicatulus maxilla (UQPL29); (H) Pseudomys desertor molar (UQPL30); (I) Pseudomys gouldii maxilla (UQPL31); (J) Pseudomys gracilicaudatus maxilla (UQPL32); (K) Zyzomys sp. molar (UQPL33); (L) Hydromys chrysogaster molar (UQPL34); (M) Melomys cervinipes maxilla (UQPL35); (N) Rattus sp. maxilla (UQPL36); (O) Rattus lutreolus maxilla (UQPL37); (P) Miniopterus orianae maxilla (UQPL38). Scale bars = 1 mm.
Figure 4 in Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
Figure 4. Non-mammal vertebrates of the Broken River karst area. (A–B) anuran pelves (UQPL1–2); (C) scincid dentary (UQPL3); (D) agamid upper jaw (UQPL4); (E) varanid osteoderm (UQPL5); (F) pythonid vertebra (UQL6; (G) elapid vertebra (UQPL7); (H–I) avian humeri (UQPL8–9). Scale bars = 1 mm.
Figure 8. U in Late Quaternary Fossil Vertebrates of the Broken River Karst Area, Northern Queensland, Australia
Figure 8. U-series dated fossil samples from the Broken River karst area. (A) breccia karst from Beehive; (B) breccia clast from Big Ho. Arrows indicate dated specimens. Scale bars = 10 mm.
Data for: Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia)
Open the record for dataset details and reuse information.
Late Quaternary Extension Rates Across the Northern Half of the Yadong-Gulu Rift – Implication for East-West Extension in Southern Tibet
<p><strong>Table 1:</strong> 10Be surface-exposure dating of the moraine samples.</p> <p><strong>Table 2:</strong> 10Be and 26Al surface-exposure dating of the alluvial samples.</p>
Orbital-controlled mid-latitude North Pacific dust flux during the late Quaternary
<p>Airborne mineral dust is sensitive to climatic changes, but its response to orbital forcing is still not fully understood. Here, we present a reconstruction of dust input to the Subarctic Pacific Ocean covering the past 190 kyr. The dust composition record is indicative of source moisture conditions, which are dominated by precessional variations. In contrast, the dust flux in marine sediments is dominated by obliquity variations, and display an out-of-phase relationship with a dust record from the mid latitude North Pacific Ocean. Climate model simulations suggest a precessional forcing likely affected the aridity and extent of the dust source regions. Meanwhile, the obliquity variations can be explained by meridional shifts in the North Pacific westerly jet, driven by changes in the meridional atmospheric temperature gradient. Our findings suggest that North Pacific dust input were primarily modulated by orbital-controlled source aridity and westerly during the late Quaternary.</p>
Geomorphic dating of across-fault gully incision reveals time-invariant late Quaternary slip-rates at the eastern termination of the Altyn Tagh Fault
<p>Interpretation of fault slip-rates inferred from tectonically offset fluvial landforms is often limited by uncertainties associated with difficulties to explicitly date fluvial incision across the fault. Here, we employed morphology-based modeling to ameliorate this universal dating limitation for gullies that were differentially offset in a sinistral sense across the Altyn Tagh Fault near its eastern termination at ~97°E. Using a stream-power erosion model with locally calibrated coefficients we calculated across-fault gully incision ages that decrease with offset magnitude, are up to threefold younger than the age of the terrace they incised and all-together point towards time-invariant sinistral slip. Luminescence dating of offset alluvial terraces at the same site suggests constant sinistral slip at 0.5±0.1 mm/yr since 52±4 ka. Our results are consistent with northeastward expansion of the Tibetan Plateau into stable parts of central Asia through an episodic, “stepwise” process punctuated by prolonged geologic time intervals of constant deformation rates.</p>
Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0) in R
<p>We present a chronology framework named LegacyAge 1.0 containing harmonized chronologies for 2831 pollen records (downloaded from the Neotoma Paleoecology Database and the supplementary Asian datasets) together with their age control points and metadata in machine-readable data formats. Here, we provide the R-code for calculation and comparison chronologies with embedded manual, metadata for code runs, Bacon output graphs of each record, graphs comparison of original chronologies and LegacyAge 1.0, and a short shared-screen video of the R-code to show the usage on two example records separately.</p> <p>Supplement to: Li, C., Postl, A. K., Böhmer, T., Cao, X., Dolman, A. M., and Herzschuh, U.: Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0), Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2021-212, in review, 2021.</p>
The hidden legacy of megafaunal extinction: loss of functional diversity and resilience over the late Quaternary at Hall's Cave
<p>This dataset contains trait data and R code used in the analysis for the paper "Hedberg, C.P., Lyons S.K., & Smith F.A. (2021). THe Hidden Legacy of megafaunal extinction: loss of functional diversity and resilience over the Late Quaternary at Hall's Cave. Global Ecology and Biogeography. https://doi.org/10.1111/geb.13428"</p> <p>We collected data for eight functional traits (mass, diet, arboreality, cursoriality, soil disturbance, group size, activity period, migration habit) that collectively describe a species' ecological role and influence on ecosystem processes. With these data, we investigated changes in functional diversity and redundancy of a local mammal community over time at Hall's Cave, a site in Central Texas with a continuous record from 21,000 years ago to the present. Additionally, we included several common introduced and domestic species to the modern community to test whether they restore some lost ecological function. </p> <p>We found that declines in functional diversity were greater than expected given the decrease in species richness, implying lost taxa contributed higher than average distinct ecological function. Functional distances between remaining species increased through time leading to lowered functional redundancy in younger communities. However, recently introduced taxa increased functional diversity to levels similar to the Holocene and partially restored functional space occupied by Late Pleistocene fauna. Our local-scale analysis demonstrates how prolonged biodiversity erosion not only leads to functionally depauperate communities, but critically lowers ecological resilience to future disturbance.</p>
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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