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- W63343516 abstract "INTRODUCTION One of the most important developments in coal measure stratigraphy in the last fifteen years has been the study of the microspore content of coal as applied to the correlation of seams and of stages in the coal measure series. In their practical application such methods of correlation have many advantages over methods based -on lithology and on relative thicknesses of strata ; they are also preferable in some respects to other palaeontological methods such as those based on plants and fresh water molluscs, as the results lend themselves readily to quantitative treatment. An account of the principles involved may be read in Raistrick and Marshall (1939, pp. 127-133) , who describe the work as involving making use of the coal itself, rather than, and in addition to, the fossils contained in the adjacent strata. It is sufficient to state here that the microspores were widely distributed and freely mixed by wind action, so that localities on the same horizon have very similar microspore assemblages ; successive horizons, on the other hand, have distinctively different assemblages which are related to changes in the flora in the intervening time. Steady progress is being made in the correlation of seams by microspore content in England and the United States. In Australia work has been initiated by Dulhunty (1946) by a description of the microspore types present in the Permian coals of New South Wales, which has been followed by a study of their stratigraphical distribution. The purpose of the work here recorded on the Queensland Permian types is to provide a basis for future work on correlation of seams within some of the coalfields, and also to attempt a correlation of the Queensland series with the standard succession of the New South Wales Permian. Owing to the writer's impending departure from Australia for some years, time has not been available to study the spore content of every occurrence of Permian coal. Consequently work has been concentrated on the major coalfields, and this paper is to be regarded as preliminary rather than exhaustive in nature." @default.
- W63343516 created "2016-06-24" @default.
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- W63343516 date "1946-01-01" @default.
- W63343516 modified "2023-09-26" @default.
- W63343516 title "Microspore types in some Queensland Permian coals" @default.
- W63343516 hasPublicationYear "1946" @default.
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