Stratigraphy of the Marmaton Group, Pennsylvanian, in Kansas

The Marmaton group comprises four limestones and four shale formations which lie in the upper part of rocks of Desmoinesian age in Kansas. Rocks of this group are underlain by the Cherokee shale; they lie below a regional unconformity that is regarded as separating rocks of Desmoinesian age from those of Missourian age. The outcrop belt of these rocks in Kansas ranges in width from about 10 to 25 miles, and extends from Linn and Bourbon counties on the Kansas-Missouri boundary to Montgomery and Labette counties on the Kansas-Oklahoma boundary. The rock units are described in detail and 179 stratigraphic sections measured in Kansas are given. A few sections measured in neighboring parts of Missouri and Oklahoma are also included. The rock descriptions are based on studies of these and many other less complete exposures. Exposures of Marmaton rocks in Kansas offer excellent opportunities for studying cyclic deposits. Both cyclothems and megacyclothems are more or less readily identified in these sediments

Classification of the Marmaton Group, Pennsylvanian, in Kansas

The Marmaton group consists of about 250 feet of limestone, shale, sandstone, and coal which, together with the underlying Cherokee shale, comprise the Des Moines series of Carboniferous (Pennsylvanian) age in the northern Mid-continent area. The outcrop area of Marmaton rocks extends from southern Iowa across Missouri and southeastern Kansas into northeastern Oklahoma. Marmaton rocks seem to rest conformably on the Cherokee shale, but are separated from the overlying rocks of the Missouri series by a regional disconformity. Marmaton rocks have long been subdivided into limestone formations and shale formations, and these have been given formal names. A few of the members of the limestone formations have been named, but the classification thus far has been decidedly incomplete. This paper introduces names for several limestone and shale units within the limestone formations and hence offers a more nearly complete classification applicable to the group in Kansas and at least in part in other states. Names are given to members of the Fort Scott, Pawnee, Altamont, and Lenapah limestone formations, and names are suggested for sandstones (probably better termed sandy facies) in the Bandera and Nowata shales. Although the lithology of Marmaton rocks is not described here in detail, some descriptions of lateral and vertical changes are nevertheless included. The fact that there is plain evidence of cyclic sedimentation is noted. It is explained that the rocks of the Marmaton group are readily divisible into megacyclothems and cyclothems

Low cost solar array project 1: Silicon material

The low cost production of silicon by deposition of silicon from a hydrogen/chlorosilane mixture is described. Reactor design, reaction vessel support systems (physical support, power control and heaters, and temperature monitoring systems) and operation of the system are reviewed. Testing of four silicon deposition reactors is described, and test data and consequently derived data are given. An 18% conversion of trichlorosilane to silicon was achieved, but average conversion rates were lower than predicted due to incomplete removal of byproduct gases for recycling and silicon oxide/silicon polymer plugging of the gas outlet. Increasing the number of baffles inside the reaction vessel improved the conversion rate. Plans for further design and process improvements to correct the problems encountered are outlined

Preparation and Potential Applications of Evacuated Closed-Cell Plastic Foams

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67368/2/10.1177_0021955X9002600201.pd

Transitory Effects of Dimethyl Sulfoxide on the Electrical Properties of Isolated Frog Skin

The experiments indicate that when DMSO-Ringer\u27s solutions are applied to the outside of the frog skin, the electrical potential difference across the skin decreases while the short circuiting current increases slightly. Ringer\u27s solutions containing DMSO applied to the inside of the skin caused both the short circuiting current and the potential difference across the skin to decrease. These observations appear to be directly related to the concentration of DMSO-Ringer\u27s applied. The observed effects are discussed with respect to possible changes in the skin brought about by the DMSO and the relationships of these phenomena to active transport functions of the skin

Intersections of Identity, Culture, and Curriculum on the Threshold of a Latinx Transforming EdD program at a Hispanic Serving Institution

A constellation of emergent research is devoted to critiquing the institutional identities of Hispanic Serving institutions (HSIs) as primarily Hispanic-enrolling institutions and then exploring frameworks and practices aimed at transforming them into what García (2019) terms Latinx-serving institutions. The purpose of this essay is to explore the intersections of culturally relevant, responsive, and sustaining approaches and as potentially decolonizing curricular spaces of EdD program (re)design at HSIs. This essay draws from two qualitative studies exploring critical approaches to curriculum and pedagogy and program redesign in order to re-align questions about serving Latinx students toward practices of critical consciousness situated at the intersection of identity, culture, and curriculum. Findings include the ways in which those notions are different and similar, and the unique lens each offers the teachers and EdD program redesign. Implications discussed in this essay highlight the possibilities and problems of culturally relevant, responsive, and sustaining approaches for EdD program redesign and how they might look when applied in HSI EdD programs. Such findings are not only useful in lending insight into the specific complexities of HSI efforts to develop EdD programs that better serve Latinx students in transformative ways. These findings also indicate that the process through which this is undertaken benefits from critical consciousness aimed at individual and collective conscientization among students and faculty as well as curricular outcomes shaped by discourses of social justice

Coal Resources of the Douglas Group in East-Central Kansas

Rocks of the Douglas group, Missourian series, Pennsylvanian. crop out in eastern Kansas in a belt a few miles wide extending from Leavenworth County to Chautauqua County. Several coal beds occur in these rocks and a few million tons of bituminous coal are available for mining. Because this coal is of relatively low grade and occurs generally in thin beds it has not been mined very extensively. The greatest mining developments have been in Franklin County, but the deposits have been mined intermittently in several other places. Both open pit and underground mines have been operated. These coal deposits are known to be of sufficient quality and quantity to be potential sources of emergency fuel. They lie in a rather densely populated area. In some locations, economical strip mining can be developed and coal can be easily and quickly obtained. Chemical tests indicate that although this coal is not of the same grade as that from the larger Kansas fields, it lies well within the limits of coal classed as bituminous, and that the heating value ranges up to 13,900 B.T.U\u27s. per pound

Aqueous carbonic acid: A readily removable electrolyte for the recovery of [18F]fluoride from anion exchange resins

[18F]Fluoride was recovered from [18O]target water in high yield by trapping it on a microcolumn of an anion exchange resin (20 mg Dowex 1 x 8, 400 mesh) and subsequent elution of the column (in the reverse direction) by aqueous carbonic acid at 52 atm. The carbonic acid was removed from the [18F]fluoride solution by brief heating at 85[deg]C, 1 atm. Thus no extraneous electrolyte was introduced by the extraction process. The resulting bicarbonate form of the resin was immediately capable of trapping further [18F]fluoride, permitting a repetitive remote system for recovery of [18O]water. Chloride was substantially retained on the column permitting separation of [18F]fluoride from the former.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/29616/1/0000705.pd