By By (author) Albert Charles Seward
The Sedgwick Prize for the easiest essay on a geological topic was once instituted in reminiscence of Adam Sedgwick, the geologist who brought Darwin to geology in jogging excursions of north Wales, yet later adversarial his theories. one among its most outstanding winners used to be A. C. Seward (1863-1941), then a tender lecturer in botany at Cambridge. He mixed the research of botany with geology in his study on what the age and placement of fossilised flowers can exhibit in regards to the climates of other geological sessions. the writer of the traditional early twentieth-century textbook within the box, Fossil crops for college kids of Botany and Geology (1898-1919), he served as Professor of Botany at Cambridge, grasp of Downing collage and Vice-Chancellor of Cambridge collage. This Sedgwick Prize essay units out the nation of information within the box in 1892 and used to be the basis of a lifetime's paintings in palaeobotany.
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Additional resources for Fossil Plants as Tests of Climate: Being the Sedgwick Essay Prize for the Year 1892
Example text
The Southernflorais similarly divided into zones. The Tropical flora includes three subdivisions, upon whose characters we need offer no further comment. From the point of view of the periodic phenomena in plant life depending on light, warmth and moisture, six vegetation zones have been suggested by Drude2. I. Arctic, Glacial and Tundra zone. II. Zone of cone-bearing and foliage trees, and of summergreen moors and meadows. 1 Bentham (1). Dyer (1). s Drude (1), p. 83. PLANT DISTRIBUTION. 35 III.
The elements of the intermediate or temperate flora are characterised by rapid growth, good means of dispersion and the capability of adapting themselves to a great variety of physical and climatological conditions. Here are characters which we may well suppose were possessed by the vegetation which spread over the same regions in Palaeozoic times. The Southernflorais similarly divided into zones. The Tropical flora includes three subdivisions, upon whose characters we need offer no further comment.
II. Xerophilen. III. Mesothermen. IV. Mikrothermen. V. Hekistothermen. Drude2 points out that we have in certain Algse of warm springs the survivors of a once widely spread group, the Megistothermen. These probably agree in their biological characters with those plants which predominated in the earliest periods, and whose representatives we have in the Algse, Ferns, Lycopodiaceaa and Equisetaceae of the Coal-measures. The characteristics of these five groups are briefly summarized by Drude, and we are reminded of the peculiar nature of this grouping of de Candolle; his object was to establish physiological groups which would be equally applicable to past and present plant geography (Groupes physiologiques applicables & la giographie botanique ancienne et moderne).