. The restrictions implemented to contain the spread of the COVID-19 pandemic during 2020 and 202... more . The restrictions implemented to contain the spread of the COVID-19 pandemic during 2020 and 2021 have forced university-level educators from around the world to seek alternatives to residential physical field trips which constitute a fundamental pillar of geoscience programmes. The field-mapping course for 2nd year Geology BSc students from the Cardiff University was replaced with a virtual mapping course set in the same area as previous years, the Esla Nappe (Cantabrian Zone, NW Spain). The course was designed with the aim of providing the students with the same methodology employed in physical mapping, gathering discrete data in stops located along five daily itineraries. Data included bedding attitude, outcrop descriptions with a certain degree of ambiguity, photographs and/or sketches, panoramic photos and fossil images. Data was provided to the students through georeferenced KMZ files in Google Earth. Students were asked to keep a field notebook, define lithological units of mappable scale, identify large structures such as thrust faults and folds with the aid of age estimations from fossils, construct a geological map on a hard-copy topographic map, draw a stratigraphic column and cross sections, and plot the data in a stereonet to perform structural analysis. The exercise allowed a successful training of diverse geological field skills. In the light of the assessment of reports and student surveys, a series of improvements for the future is considered. Though incapable of replacing a physical field course, the virtual exercise could be used in preparation for the residential fieldtrip.
... growth rates are influenced not only by en-vironmental factors, but also by biological events... more ... growth rates are influenced not only by en-vironmental factors, but also by biological events like breeding periods, which are typically synodic (Pannella and MacClintock, 1968a, b). In living chitons, where growth bands on shells are not always obvious (Christian-sen, 1954 ...
As a field test for Cherns and Wright's previously published hypothesis based on Paleozoic f... more As a field test for Cherns and Wright's previously published hypothesis based on Paleozoic faunasthat the paucity of certain molluscan groups in the fossil record may be largely a taphonomic, not ecologic, effecta typical Mesozoic molluscan-dominated fauna is ...
Controls on Carbonate Platform and Reef Development, 2008
... the Oligo-Miocene of the Murray Basin, Australia, compiling, from the literature, the fau-nal... more ... the Oligo-Miocene of the Murray Basin, Australia, compiling, from the literature, the fau-nal and ... and gastropods but also cephalopods; where ammonoids are found, they lack replaced shells, implying that ... Being able to understand and quantify the loss of aragonite is not just an ...
. The restrictions implemented to contain the spread of the COVID-19 pandemic during 2020 and 202... more . The restrictions implemented to contain the spread of the COVID-19 pandemic during 2020 and 2021 have forced university-level educators from around the world to seek alternatives to residential physical field trips which constitute a fundamental pillar of geoscience programmes. The field-mapping course for 2nd year Geology BSc students from the Cardiff University was replaced with a virtual mapping course set in the same area as previous years, the Esla Nappe (Cantabrian Zone, NW Spain). The course was designed with the aim of providing the students with the same methodology employed in physical mapping, gathering discrete data in stops located along five daily itineraries. Data included bedding attitude, outcrop descriptions with a certain degree of ambiguity, photographs and/or sketches, panoramic photos and fossil images. Data was provided to the students through georeferenced KMZ files in Google Earth. Students were asked to keep a field notebook, define lithological units of mappable scale, identify large structures such as thrust faults and folds with the aid of age estimations from fossils, construct a geological map on a hard-copy topographic map, draw a stratigraphic column and cross sections, and plot the data in a stereonet to perform structural analysis. The exercise allowed a successful training of diverse geological field skills. In the light of the assessment of reports and student surveys, a series of improvements for the future is considered. Though incapable of replacing a physical field course, the virtual exercise could be used in preparation for the residential fieldtrip.
... growth rates are influenced not only by en-vironmental factors, but also by biological events... more ... growth rates are influenced not only by en-vironmental factors, but also by biological events like breeding periods, which are typically synodic (Pannella and MacClintock, 1968a, b). In living chitons, where growth bands on shells are not always obvious (Christian-sen, 1954 ...
As a field test for Cherns and Wright's previously published hypothesis based on Paleozoic f... more As a field test for Cherns and Wright's previously published hypothesis based on Paleozoic faunasthat the paucity of certain molluscan groups in the fossil record may be largely a taphonomic, not ecologic, effecta typical Mesozoic molluscan-dominated fauna is ...
Controls on Carbonate Platform and Reef Development, 2008
... the Oligo-Miocene of the Murray Basin, Australia, compiling, from the literature, the fau-nal... more ... the Oligo-Miocene of the Murray Basin, Australia, compiling, from the literature, the fau-nal and ... and gastropods but also cephalopods; where ammonoids are found, they lack replaced shells, implying that ... Being able to understand and quantify the loss of aragonite is not just an ...
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Papers by Lesley Cherns