Snag Conodonts From The Glen Dean Formation (Chester) Of The Illinois Basin (Classic Reprint) Produced By Carl Buckner Rexroad Listed As Softcover

from Conodonts From the Glen Dean Formation Chester Of the Illinois Basin

Studies of conodonts from 'the Chester Series in the type area of southwestern Illi nois rexroad,showed a diversified fauna from eight formations and indicated that conodonts will be useful in strati graphic investigations of Chester strata.
Although the earlier study establishedthe Chester conodont fauna as a whole, that study was confined to one area and mainly to the shale beds.
Thus it did not allow evaluation of limestone faunas, effects of facies changes, nor faunal variations Within a single formation over a broad area.
Such details, along with the more precise delim iting of stratigraphic ranges within the se ries, were the objectives of the present study.
The Glen Dean Formation was

chosen for study because:it contains relatively abundant conodonts in the type area of the Chester Seriesit is well exposed around the margin of the Illinois Basinin much of its outcrop area it consists of a lower massive limestone unit and an upper unit of mixed lithology, dominantly shale, which would be desirable for facies analysis.
.