. Brachiopoda and biostratigraphy of the Silurian-Devonian Delorme Formation in the District of Mackenzie, the Yukon. Brachiopoda, Fossil; Paleontology; Paleontology; Paleontology. Text-fig. 1 Index map of area showing locations of measured sections. Delorme becomes still thinner and consists of very recessive, poorly fossiliferous to nonfossiliferous, thin- bedded, mudcracked dolostones, some of which contain halite pseudomorphs and intraformational dolostone brec- cias, a condition persisting also in the central part of the region (for example, the Coates Lake area). In the June Lake area (s
. Brachiopoda and biostratigraphy of the Silurian-Devonian Delorme Formation in the District of Mackenzie, the Yukon. Brachiopoda, Fossil; Paleontology; Paleontology; Paleontology. Text-fig. 1 Index map of area showing locations of measured sections. Delorme becomes still thinner and consists of very recessive, poorly fossiliferous to nonfossiliferous, thin- bedded, mudcracked dolostones, some of which contain halite pseudomorphs and intraformational dolostone brec- cias, a condition persisting also in the central part of the region (for example, the Coates Lake area). In the June Lake area (sections 8 and 10, Text-fig. 1) the Delorme is approximately 460 m thick. The upper one-half of the formation comprises a resistant sequence of medium-bedded dolostones and limestones containing a sparse fauna of large, smooth ostracodes. This unit is underlain by a recessive unit of very argillaceous dolostones containing brachiopods, trilobites, and a few poorly preserved graptolites. The lower one-third of the formation is represented by a sequence of brown- weathering, argillaceous limestones, grading downwards into very thin-bedded, recessive, black shales of the Road River Formation. Southwards to sections 1 to 3 (Text-fig. 1) thicknesses range from 160 to 460 m, and the typical orange. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Perry, David G. (David George), 1947-; Royal Ontario Museum. Toronto : Royal Ontario Museum
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Keywords: ., bookcentury1900, bookd, bookleafnumber17, booksubjectpaleontology
