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FIG. 3 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 3. — Lithostratigraphic column showing the lithology, constituents and facies of the Dhudial Section.

FIG. 5 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 5. — Photomicrographs of thin slides: A, Planktonic foraminifera () and ferroan euhedral dolomite crystals () (S# 09); B, dolomitized zone () with planktonic foraminifera (), radiolarians () and ostracods () (S# 25); C, contact of the foraminiferal wackestone and packstone patch (S# 22); D, radiolarian rich facies showing radiolarians () and calcispheres () (S# 18); E, Heterohelix sp. () along with radiolarians () and ostracods () (S# 17); F, dolomitized zone between the lime mudstone (MS) and wackestone (WS) (S# 11); G, tectonic induced fracturing (S# 07); H, radiolarians () and zoned ferroan dolomite crystals in the mudstone facies (S# 11); I, well rounded feldspar grains (S# 38); J, chert lithic (S# 36); K, ferruginous matrix (S# 37); L, quartz () and feldspar () grains in Hangu Formation (S# 38). Scale bars: A-C, F, G, 200 µm; D, E, H-L, 100 µm.

FIG. 1 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 1. — Regional geological map after Burg (2011). The red square corresponds to studied location at Dhudial.

FIG. 9 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 9. — Sketch showing the platform evolution through different stages. The platform geometry in the early Campanian time (Stage I) during deposition of Kawagarh Formation was characterized by a steeper ramp. An incised valley and sequence boundary developed in Stage II during Selandian and the platform configuration became much gentler during the Thanetian (Stage III) as the accommodation space filled up.

FIG. 7 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 7. — Chart showing the sequence stratigraphic framework, sea level changes and paleoecology of the Dhudial Section.

FIG. 8 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 8. — Chart showing the planktonic foraminiferal distribution and biozones of the Dhudial Section.

publicMay 2024View details →

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Data from: A new Paleogene fossil and a new dataset for waterfowl (Aves: Anseriformes) clarify phylogeny, ecological evolution, and avian evolution at the K-Pg boundary

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FIG. 2 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 2. — Generalized stratigraphy of the study area (Shah 2009).

publicMay 2016View details →

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Data from: Therian mammals experience an ecomorphological radiation during the Late Cretaceous and selective extinction at the K-Pg boundary

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opencc-zeroDec 2017View details →

Data from: Simultaneous radiation of bird and mammal lice following the K-Pg boundary

The diversification of parasite groups often occurs at the same time as the diversification of their hosts. However, most studies demonstrating this concordance only examine single host-parasite groups. Multiple diverse lineages of ectoparasitic lice occur across both birds and mammals. Here we describe the evolutionary history of lice based on analyses of 1,107 single copy orthologous genes from sequenced genomes of 46 species of lice. We identify three major diverse groups of lice: one exclusively on mammals, one almost exclusively on birds, and one on both birds and mammals. Each of these groups radiated just after the Cretaceous-Paleogene (K-Pg) boundary, the time of the mass extinction event of the dinosaurs and rapid diversification of most of the modern lineages of birds and mammals.

opencc-zeroDec 2014View details →

Data from: Avian diversification patterns across the K-Pg boundary: influence of calibrations, datasets and model misspecification

Birds represent the most diverse extant tetrapod clade, with ca. 10,000 extant species, and the timing of the crown avian radiation remains hotly debated. The fossil record supports a primarily Cenozoic radiation of crown birds, whereas molecular divergence dating analyses generally imply that this radiation was well underway during the Cretaceous. Furthermore, substantial differences have been noted between published divergence estimates. These have been variously attributed to clock model, calibration regime, and gene type. One underappreciated phenomenon is that disparity between fossil ages and molecular dates tends to be proportionally greater for shallower nodes in the avian Tree of Life. Here, we explore potential drivers of disparity in avian divergence dates through a set of analyses applying various calibration strategies and coding methods to a mitochondrial genome dataset and an 18-gene nuclear dataset, both sampled across 72 taxa. Our analyses support the occurrence of two deep divergences (i.e., the Palaeognathae/Neognathae split and the Galloanserae/Neoaves split) well within the Cretaceous, followed by a rapid radiation of Neoaves near the K-Pg boundary. However, 95% highest posterior density intervals for most basal divergences in Neoaves cross the boundary, and we emphasize that, barring unreasonably strict prior distributions, distinguishing between a rapid Early Paleocene radiation and a Late Cretaceous radiation may be beyond the resolving power of currently favored divergence dating methods. In contrast to recent observations for placental mammals, constraining all divergences within Neoaves to occur in the Cenozoic does not result in unreasonably high inferred substitution rates. Comparisons of nuclear DNA (nDNA) versus mitochondrial DNA (mtDNA) datasets and NT- versus RY-coded mitochondrial data reveal patterns of disparity that are consistent with substitution model misspecifications that result in tree compression/tree extension artifacts, which may explain some discordance between previous divergence estimates based on different sequence types. Comparisons of fully calibrated and nominally calibrated trees support a correlation between body mass and apparent dating error. Overall, our results are consistent with (but do not require) a Paleogene radiation for most major clades of crown birds.

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FIG. 4 in Foraminiferal biostratigraphy, facies and sequence stratigraphy analysis across the K-Pg Boundary in Hazara, Lesser Himalayas (Dhudial Section)

FIG. 4. — Field photograph of the studied Dhudial Section: A, stratigraphic contacts of different ages; B, authigenic quartz near the boundary; C, Outcrop view of probable OAE3.

publicJun 2016View details →

Data from: Avian diversification patterns across the K-Pg boundary: influence of calibrations, datasets and model misspecification

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