Outputs (9)

An Image Mapping Approach to U-Pb LA-ICP-MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation (2018)
Journal Article
Drost, K., Chew, D., Petrus, J. A., Scholze, F., Woodhead, J. D., Schneider, J. W., & Harper, D. A. (2018). An Image Mapping Approach to U-Pb LA-ICP-MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation. Geochemistry, Geophysics, Geosystems, 19(12), 4631-4648. https://doi.org/10.1029/2018gc007850

We present a new approach to laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) U‐Pb dating of carbonates based on selection and pooling of pixels from 2‐D elemental and isotopic ratio maps. This image mapping technique is partic... Read More about An Image Mapping Approach to U-Pb LA-ICP-MS Carbonate Dating and Applications to Direct Dating of Carbonate Sedimentation.

New records of brachiopods and crinoids from the Silurian (Wenlock) of the southern Urals, Russia (2018)
Journal Article
Bogolepova, O. K., Donovan, S. K., Harper, D. A., Suyarkova, A. A., Yakupov, R., & Gubanov, A. P. (2018). New records of brachiopods and crinoids from the Silurian (Wenlock) of the southern Urals, Russia. GFF, 140(4), 323-331. https://doi.org/10.1080/11035897.2018.1526210

Crinoids and brachiopods are described from the Silurian Uzyan Formation of the Zilair Zone in the southern Urals. The occurrence of the graptolites Coronograptus praedeubeli suggests a late Homerian (Wenlock) age for the strata. A new disparid crino... Read More about New records of brachiopods and crinoids from the Silurian (Wenlock) of the southern Urals, Russia.

The Sirius Passet Lagerstätte of North Greenland—A geochemical window on early Cambrian low‐oxygen environments and ecosystems (2018)
Journal Article
Hammarlund, E. U., Smith, M. P., Rasmussen, J. A., Nielsen, A. T., Canfield, D. E., & Harper, D. A. (2019). The Sirius Passet Lagerstätte of North Greenland—A geochemical window on early Cambrian low‐oxygen environments and ecosystems. Geobiology, 17(1), 12-26. https://doi.org/10.1111/gbi.12315

The early Cambrian Sirius Passet fauna of northernmost Greenland (Cambrian Series 2, Stage 3) contains exceptionally preserved soft tissues that provide an important window to early animal evolution, while the surrounding sediment holds critical data... Read More about The Sirius Passet Lagerstätte of North Greenland—A geochemical window on early Cambrian low‐oxygen environments and ecosystems.

Diversity and biostratigraphic utility of Ordovician brachiopods in the East Baltic (2018)
Journal Article
Hints, L., Harper, D., & Paškevičius, J. (2018). Diversity and biostratigraphic utility of Ordovician brachiopods in the East Baltic. Estonian Journal of Earth Sciences, 67(3), 176-191. https://doi.org/10.3176/earth.2018.14

The stratigraphy of the Ordovician carbonates of Baltoscandia was initially based, during the 19th century, on the stratigraphical ranges of macrofossils, mainly trilobites, but other fossils (brachiopods, echinoderms and cephalopods) were also used.... Read More about Diversity and biostratigraphic utility of Ordovician brachiopods in the East Baltic.

Silicification of low-magnesium mollusc shells from the Upper Oligocene of Antigua, Lesser Antilles (2018)
Journal Article
Strang, K., Harper, D., Donovan, S., & Portell, R. (2018). Silicification of low-magnesium mollusc shells from the Upper Oligocene of Antigua, Lesser Antilles

Silicified molluscs, namely the oyster Hyotissa and the scallop Aequipecten?, are commonly preserved as silica in the carbonate successions on the island of Antigua. These fossil assemblages are located within the Antigua Formation, above and adjacen... Read More about Silicification of low-magnesium mollusc shells from the Upper Oligocene of Antigua, Lesser Antilles.

Contextualizing the Onset of the Great Ordovician Biodiversification Event (2018)
Journal Article
Harper, D., & Servais, T. (2018). Contextualizing the Onset of the Great Ordovician Biodiversification Event. Lethaia: An International Journal of Palaeontology and Stratigraphy, 51(2), 149-150. https://doi.org/10.1111/let.12264

We introduce and briefly summarize a collection of papers contextualizing the onset of the Great Ordovician Biodiversification Event, initiated during the first meeting of IGCP project 653 at Van Mildert College, Durham University, UK, in September 2... Read More about Contextualizing the Onset of the Great Ordovician Biodiversification Event.

Brain and eyes of Kerygmachela reveal protocerebral ancestry of the panarthropod head (2018)
Journal Article
Park, T. S., Kihm, J., Woo, J., Park, C., Lee, W. Y., Smith, M. P., …Vinther, J. (2018). Brain and eyes of Kerygmachela reveal protocerebral ancestry of the panarthropod head. Nature Communications, 9(1), Article 1019. https://doi.org/10.1038/s41467-018-03464-w

Recent discoveries of fossil nervous tissue in Cambrian fossils have allowed researchers to trace the origin and evolution of the complex arthropod head and brain based on stem groups close to the origin of the clade, rather than on extant, highly de... Read More about Brain and eyes of Kerygmachela reveal protocerebral ancestry of the panarthropod head.

Characterization of kerogenous films and taphonomic modes of the Sirius Passet Lagerstätte, Greenland (2018)
Journal Article
Topper, T. P., Greco, F., Hofmann, A., Beeby, A., & Harper, D. A. (2018). Characterization of kerogenous films and taphonomic modes of the Sirius Passet Lagerstätte, Greenland. Geology, 46(4), 359-362. https://doi.org/10.1130/g39930.1

The Sirius Passet Lagerstätte (northern Greenland) is an exceptionally well-preserved early Cambrian faunal community containing a diverse array of stem-group euarthropods, lobopodians, worms, sponges, and the iconic Halkieria. Material collected in... Read More about Characterization of kerogenous films and taphonomic modes of the Sirius Passet Lagerstätte, Greenland.

The Great Ordovician Biodiversification Event (GOBE): definition, concept and duration (2018)
Journal Article
Servais, T., & Harper, D. A. (2018). The Great Ordovician Biodiversification Event (GOBE): definition, concept and duration. Lethaia: An International Journal of Palaeontology and Stratigraphy, 51(2), 151-164. https://doi.org/10.1111/let.12259

The Ordovician biodiversification has been recognized since the 1960s; the term ‘The Great Ordovician Biodiversification Event’, abbreviated by many as the ‘GOBE’, has been used for the past 20 years. The conceptual development and terminology applie... Read More about The Great Ordovician Biodiversification Event (GOBE): definition, concept and duration.