4141 to 4152 of 14035 results
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Angiosperm fossils in supposed Jurassic volcanogenic shales, Antarctica
Read more of: Angiosperm fossils in supposed Jurassic volcanogenic shales, AntarcticaDuring palaeobotanical studies in the Antarctic Peninsula in February 1979, late Cretaceous or younger fossil angiosperm leaves were found within volcaniclastic rocks widely believed to be of late Jurassic age1. […]
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Lobe growth and marginal zonation in crustose lichens
Read more of: Lobe growth and marginal zonation in crustose lichensLobes of Xanthoria elegans are shown to be engulfed by more rapidly growing neighbouring lobes, thereafter ceasing to grow, and the rate of lobe engulfment increases with thallus age. Similarly, […]
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Characteristics and classification of the lakes of Signy Island, South Orkney Islands, Antarctica
Read more of: Characteristics and classification of the lakes of Signy Island, South Orkney Islands, AntarcticaThe lakes of Signy Island (60° 43′S, 45° 38′W), South Orkney Islands, Antarctica, provide a unique laboratory for the study of many processes including natural eutrophication. Current relationships between the […]
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Isotopic evidence for the provenance of some Caledonian granites
Read more of: Isotopic evidence for the provenance of some Caledonian granitesA combined Nd- and Sr-isotope study of Caledonian granites in Scotland and northern England demonstrates the importance of continental crust in their petrogenesis and places limits on the involvement of […]