Kalewa Section, Sample 2: Bartonian, Myanmar

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Celtispollenites sp. microspore
Saxosporis sp. microspore Krutzsch 1963
Anthocerisporis sp. microspore Krutzsch 1963
Lycopodiopsida - Selaginellales - Selaginellaceae
? Selaginella sp. microspore Beauvois 1804
Pteridopsida
Deltoidospora sp. microspore Miner 1935
Crassoretitriletes vanraadshooveni microspore Hopping and Muller 1968
Polypodiopsida - Schizaeales - Schizaeaceae
Cicatricososporites eocenicus microspore Jansonius and Hills 1976
Polypodiopsida - Polypodiaceae
Laevigatosporites sp. microspore Ibrahim 1933
Verrucatosporites sp. microspore Pflug and Thomson 1953
Verrucatosporites usmensis microspore Germeraad et al. 1968
unclassified
Dicolpopollis kalewensis microspore
Dicolpopollis sp. microspore Pflanzl 1956
Ranunculacidites operculatus microspore Jaramillo and Dilcher 2001
Pinopsida - Pinales - Pinaceae
Pinuspollenites sp. microspore Raatz 1938
Magnoliopsida
Malvacipollis sp. microspore Harris 1965
Malvacipollis ? diversus microspore Harris 1965
Angiospermae - Magnoliales - Magnoliaceae
Magnoliaceae indet. microspore de Jussieu 1789
Angiospermae - Fagales - Casuarinaceae
Casuarinidites cainozoicus microspore Cookson and Pike 1954
Angiospermae - Fagales - Fagaceae
Cupuliferoipollenites sp. microspore Potonié
Angiospermae - Malpighiales - Euphorbiaceae
Euphorbiaceae indet. microspore Jussieu 1789
Cephalomappa malloticarpa microspore
Angiospermae - Malpighiales - Calophyllaceae
Calophyllumpollenites sp. microspore Sah and Kar 1974
Angiospermae - Sapindales - Sapindaceae
Cupanieidites flaccidiformis microspore
Acerpollenites sp. microspore Misra and Kapoor 1994
Angiospermae - Sapindales - Anacardiaceae
Campnosperma sp. microspore Thwaites 1854
Angiospermae - Sapindales - Meliaceae
Meliaceae indet. microspore de Jussieu 1789
Angiospermae - Malvales - Malvaceae
Discoidites sp. microspore Muller
Discoidites angulosus microspore
Discoidites cf. pilosus microspore
Angiospermae - Malvales - Tiliaceae
Intratriporopollenites instructus microspore
Angiospermae - Myrtales
Heterocolpites combretoides microspore
Angiospermae - Myrtales - Sonneratiaceae
Florschuetzia cf. trilobata microspore
Angiospermae - Myrtales
Myrtaceidites sp. microspore Cookson and Pike 1960
Angiospermae - Ericales - Lecythidaceae
Marginipollis sp. microspore Clarke 1968
Angiospermae - Ericales
Lanagiopollis sp. microspore Morley 1982
Angiospermae - Ericales - Sapotaceae
Sapotaceoidaepollenites sp. microspore Potonié et al. 1950
Palaquium sp. microspore Blanco 1837
Angiospermae
Restioniidites ? punctulosus microspore
Angiospermae - Araceae
Proxapertites sp. microspore Van der Hammen 1956
Proxapertites operculatus microspore Van der Hammen 1956
Angiospermae - Arecaceae
Longapertites retipilatus microspore
Longapertites rugulatus microspore
Palmaepollenites kutchensis microspore Venkatachala and Kar 1969
Angiospermae - Gentianales - Rubiaceae
Rubiaceae indet. microspore Jussieu 1789
Angiospermae - Saxifragales - Haloragaceae
Myriophyllum sp. microspore Linnaeus 1753
Angiospermae - Solanales - Convolvulaceae
Perfotricolpites cf. digitatus microspore González-Guzmán 1967
unclassified
Acrostichum sp. microspore Linnaeus 1753
see common names

Geography
Country:Myanmar State/province:Sagaing
Coordinates: 23.3° North, 94.3° East (view map)
Paleocoordinates:14.0° North, 91.8° East
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Eocene
Stage:Bartonian 10 m.y. bin:Cenozoic 3
Key time interval:Bartonian
Age range of interval:41.20000 - 37.71000 m.y. ago
Age estimate:40 to 38 Ma (U/Pb)
Stratigraphy
Formation:Yaw
Local section:Kalewa Local bed:-250 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: This sample was taken from 250m below the rest of the section.
"The lowest two samples show an age of c. 40–38 Ma (Licht et al. 2019)." (Huang et al. 2023)
Lithology and environment
Primary lithology: lithified sandstone
Secondary lithology: mudstone
Environment:fluvial indet.
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Collection methods and comments
Collection methods:chemical
Reason for describing collection:paleoecologic analysis
Collection method comments: "Two palynological processing methods were performed to ensure maximum recovery. One set of samples was processed for quantitative analysis. The processing was as follows: 1.3 g of sample was boiled in 10% sodium pyrophosphate, and then treated with 10% HCl, and sieved with 5 μm and 212 μm meshes. The sample was then heated in acetolysis mixture to 100 °C. Bromoform-treatment was applied to separate any remaining inorganic fraction to produce residue. A second set of selected samples was processed mainly for microphotography. The processing method was as follows: 30 g of washed and dried sample was treated with 10% HCl and 40% HF. Then a heavy liquid separation was used to separate the organic and remaining inorganic fractions. All resulting residues were mounted on a slide in glycerin and sealed with paraffin for light microscope (LM) observation. Residues were further used for analysis with LM and scanning electron microscopy (SEM) at the Department of Palaeontology (DoP), University of Vienna, Austria. Details on the two methods were presented in Huang et al. (2020)." (Huang et al. 2023)
Metadata
Database number:227631
Authorizer:B. Allen Enterer:B. Allen
Modifier:B. Allen
Created:2022-10-24 07:24:27 Last modified:2022-11-01 04:42:31
Access level:the public Released:2022-10-24 07:24:27
Creative Commons license:CC BY
Reference information

Primary reference:
82916. H. Huang, R. J. Morley, A. Licht, G. Dupont-Nivet, D. Pérez-Pinedo, J. Westerweel, Z. Win, D. Wa Aung, E. Budi Lelono, G. N. Aleksandrova, R. K. Saxena and C. Hoorn. 2023. A proto-monsoonal climate in the late Eocene of Southeast Asia: evidence from a sedimentary record in central Myanmar. Geoscience Frontiers 14(1):101457 [B. Allen/B. Allen]