ISSN:0037-0746    

DOI:10.1111/j.1365-3091.1962.tb01142.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

ISSN:0037-0746    

DOI:10.1111/j.1365-3091.1962.tb01143.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYThe approximately 100‐foot thick Warrensburg sandstone (Nowata formation, Marmaton group, Pennsylvanian Desmoinesian Series, western Missouri) fills a valley‐shaped erosional channel. The rapidly lensing fluvial sediments are sandstones (45%) and siltstones and shales (50%), with subordinate basal conglomerate and coal. Sediment transport was southward, parallel to the north‐south channel. These fluvial sediments formed in a stream channel previously cut across a low coastal plain during a temporary retreat of the sea.The Warrensburg sandstone samples are a homogeneous group of fine‐grained to medium‐grained quartzose graywackes and micaceous quartzites. The grains, omitting 10% clayey matrix and 10% iron‐oxide and silica cements, average 47% common quartz, 34% metamorphic detritus (slate, phyllite, schist, highly undulose unit quartz, schistose and pressure metaquartzites, and mica), 14% plutonic detritus (feldspar and vein quartz), and 5% sedimentary grains (“second‐cycle” rounded quartz and chert). The accessory heavy mineral assemblage also reflects a mixture of metamorphic and plutonic detritus with subordinate “second‐cycle” grains (21% rounded zircon and tourmaline among the detrital, transparent, non‐micaceous grains). The distant sources of detritus in the Warrensburg and other Desmoinesian channel sandstones of Missouri are typified by metamorphic and subordinate feldspathic crystalline rocks.The average 10% feldspar (largely K‐feldspar) among the grains and 8% garnet among the detrital, transparent, non‐micaceous heavy minerals in the Warrensburg sandstone, in contrast to the near absence of these minerals in Desmoinesian channel sandstones of western Pennsylvanian, suggests that the principal sources were the Transcontinental Arch and Canadian Shield to the north and northeast. The Appalachian metamorphic belt is not as important a source area for the Western Interior Basin as

ISSN:0037-0746    

DOI:10.1111/j.1365-3091.1962.tb01144.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYThe study of the hydraulic behaviour of mica and particularly the study of the modalities of the fall of particles in a motionless liquid presents a great variety of types and a vast series of falling speeds. The observations made by McNown(1953), concerning grains, show that there are various modalities.The falling speed differs greatly from that indicated by the usual sedimentation speed curves, because the calculation of the nominal diameter in which the grain is compared to a sphere differs considerably from reality.The calculation of the drag coefficient (Cn) with regard to the Reynolds number (Re) again accentuates this disparity.

ISSN:0037-0746    

DOI:10.1111/j.1365-3091.1962.tb01145.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

摘要:

SUMMARYIn the summer of 1959, temperature, Eh, pH, chlorinity and alkalinity of sea and interstitial water were measured in the westernmost part of Great Bahama Bank and in Florida Bay (Fig. 1).Boring organisms, especially algae, grazing snails and inorganic processes are deepening solution basins there (Fig. 2, 3, 5, 6). Carbonate balance in the Bimini lagoon is influenced by the activity of grass (Fig. 8), algae and animals with carbonate tests and shells, and physicochemical differences between day and night, high and low water. Inorganic precipitation of calcium carbonate seems to be small compared with the losses due to incorporation into organisms. In Florida Bay saturation is partly influenced by plants also. Supersaturation can be high and wind action stirs up countless small carbonate particles (Fig. 7). This suggests that inorganic precipitation must occur. Calcium carbonate precipitation as outlined by Smith(1940) was observed on Great Bahama Bank even in the mixed waters of the westernmost parts and in the interstitial water of moving oolitic sand.

ISSN:0037-0746    

DOI:10.1111/j.1365-3091.1962.tb01146.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

ISSN:0037-0746    

DOI:10.1111/j.1365-3091.1962.tb01147.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY

ISSN:0037-0746    

DOI:10.1111/j.1365-3091.1962.tb01148.x

出版商:Blackwell Publishing Ltd    

年代:1962

数据来源: WILEY