2,211 research outputs found
Local Church Week Pastor Andre Mitchell
No full textPastor Andre Mitchell, Pastor, Author, CEO, Deliverance Temple/Andre Mitchell Ministries, Muncie, IN, speaks on how connecting with other believers is important to your faith for Local Church Week
Pearl Andre, Political Activist and Author from Bismarck
No full textAn undated photograph of Pearl Andre, an author and political activist from Bismarck. She wrote the book Women on the Move about the Nonpartisan League in North Dakota in 1975.https://commons.und.edu/nd-politics-photos/1254/thumbnail.jp
Late Oligocene and Miocene evolution of the carbonate system in the Gulf of Martaban (northern Andaman Sea): Effects of eustacy, tectonics, and siliciclastic input; Comparison with the Maldives carbonate system
No full textEustacy was the dominant factor influencing the Gulf of Martaban Field isolated platform, subdivided in Lower and Upper Martaban Limestones (LML) and (UML). LML was established on top of a faulted accretionary basement that influenced the LML late Oligocene growth. At the Oligocene-Miocene boundary, siliciclastic influx inhibited the carbonate growth, infilled a central trough, and covered the LML platform top, creating a relief on top of which grew the UML platform. This platform first aggraded and backstepped, and then drowned due to early Miocene high rates of sea level rise. The Maldives, because of its bigger size, greater growth potential, and lack of siliciclastic, kept up with those early Miocene rates, while Gulf of Martaban Field drowned
Andre Gide and the Negro, 1940
No full textBecause it is generally known that Andre Gide is one of France's most influential contemporary writers, there is no need to justify a study based on his works. Desirous of obtaining the opinion of an influential white author concerning Negroid people and learning his activities in their behalf, the writer of this thesis undertook the study, Andre Gide end the Negro. The value of such a study to the American Negro lies primarily in (1) a better acquaintance with and appreciation for one whose interest in darker people has resulted in a tangible contribution; (2) a knowledge of the condition of a people, who, though distant in territory, are kindred in race, and (3) a challenge for scholastic accomplishment. The method of procedure was a careful analysis of Voyage au Congo and Retour du Tchad supplemented by collateral readings. To secure information concerning Mr. Gide's official investigation in 1938 of the natives' educational facilities in Senegal, a letter was sent him. Despite the anxiety which must be his because of the present war in which his country is involved, the eminent author found time to respond. His reply is quoted on page thirty-one of this study. Grateful acknowledgment is hereby given both Mr. Gide for his amicable letter and Professor Cook, who made such a contact possible. The various factors for the evolution of Gide's interest in Negroid people are shown in Chapter I. Chapter II contains a discussion of the colonial abuses existing in French Equatorial Africa exposed by Gide and his efforts to eradicate these. Through Chapter III one learns the author's personal impression of the morale and intelligence of Negroid people. In Chapter IV an interpretation of Gide's literary art in Voyage au Gang and Retour du Tchad is presented. The results are summarized in the conclusion
Reconstruction of eastern Pacific climate variability using multiple geochemical tracers in Cocos Island corals
No full textMultiple isotopic and geochemical tracers were employed to unravel the complex history of recent environmental variability at Cocos Island. Downcore variations in delta18O, U/Ca, Sr/Ca, and Ba/Ca within coral skeletal aragonite correlate with environmental parameters such as temperature, precipitation, and advection of surface waters. U/Ca and Sr/Ca ratios were evaluated as potential paleothermometers in conjunction with delta 18O, and indicate a combined influence of temperature and precipitation on delta18O. Ba/Ca records indicate that this tracer may be a useful tracer for the advection of coastal waters from the Gulf of Panama and the strength of the NECC. Information regarding large-scale atmospheric and oceanic processes is also embedded within the records. Long-term trends are reproducible in coral records throughout the eastern Pacific and indicate significant changes in the tropical climate system. Records developed from Cocos Island suggest an increase in rainfall in conjunction with localized cooling during the past 100 years
The Caribbean carbonate crash at the middle to late Miocene transition and the establishment of the modern global thermohaline circulation
No full textThe Caribbean carbonate crash was a time of increased regional carbonate dissolution at the middle to late Miocene transition. It is marked by five dissolution episodes, occurring from 12-10 Ma, characterized by significant reductions in carbonate mass accumulation rates (CO\sb3 MAR). We determined carbonate content and CO\sb3 MAR for sites 998-1000 over the middle to late Miocene interval. Stable isotope composition of benthic foraminifers is used to track changes in deep water masses. Carbonate mineralogies are determined for the shallow site 1000 (927 m water depth) to detect dissolution of metastable carbonates at sub-thermocline depths. The geochemical changes during the carbonate period are similar to those that occur during the Caribbean Quaternary interglacial stages, times when Antarctic Intermediate Water (AAIW) filled the Caribbean to abyssal depths. The initiation of North Atlantic Deep Water (NADW) production during this period, possibly caused by the partial closing of the Isthmus of Panama and the opening of Pedro Channel (northern Nicaragua Rise), led to reorganization of global thermohaline circulation. The increase of return flow that passes through the Caribbean may have brought corrosive AAIW into the Caribbean, causing dissolution of carbonate sediment at the sea floor
Neogene evolution of the Pedro Channel carbonate system, northern Nicaragua Rise
No full textPedro Channel is the deepest, central-most seaway on the northern Nicaragua Rise. A revised bathymetric map illustrates a seafloor dissected by numerous canyons and gullies as well as portions of a drowned carbonate bank with keep-up bank morphology. The 3.5 kHz echogram data interpretation in Pedro Channel indicates the banks provide both a line and point source of sediment to the channel floor. Concentric facies belts along the bank margins illustrate the line source concept. Localized zones of coarser-grained deposits at the bases of canyons along the bank margins depict the point source concept. The synthetic seismograms for ODP Site 1000 have low correlation coefficients (0.321). Visual correlation of the synthetic seismogram with SCS data indicates a good correlation of seismic facies with various lithologic intervals. An interpretation of SCCS and MCS data reveals that periplatform sedimentation has dominated Pedro Channel from the early Miocene to recent. Dredge haul analysis suggests that a neritic carbonate bank drowned partially in the middle Oligocene and finally in the early Miocene. Erosion affects the edges of this drowned bank in the middle Miocene. Faults in Pedro Channel illustrate characteristics typical of sinistral strike-slip faults including vertical to sub-vertical faults, faults that splay upward, forced folds, and linear fault traces in map view.
ODP Site 998 was selected over a small portion of the Cayman Rise on a small topographic high. Synthetic seismograms for ODP Site 998 have low correlation coefficients (0.168). Despite the low correlation coefficients, turbidite-rich core intervals correlate with SCS intervals having low continuity seismic reflectors. The predominantly pelagic sedimentation at this Site results in a generally continuous seismic reflection character.
ODP Site 1001 is located just north of the Hess Escarpment. Synthetic seismograms have low correlation coefficients (0.335), but do permit correlation of SCS A\sp{\prime\prime} and B\sp{\prime\prime} horizons with an Eocene-Miocene unconformity and basaltic basement respectively. Hydrosweep data indicates that the Hess Escarpment is dissected by numerous canyons incising along faults. The northwest trending normal faults are suggestive of dextral strike-slip motion
Late Quaternary periplatform sediments and environments on the northeastern Nicaragua Rise, Caribbean Sea
No full textFour main factors control the accumulation of periplatform sediment on the northeastern Nicaragua Rise: (1) input of carbonate sediment; (2) input of siliciclastic sediment; (3) physical redistribution of sediment; and (4) partial dissolution of carbonate phases (aragonite and magnesian calcite). The intensity of these factors is directly influenced by climatic variations and associated sea-level fluctuations, creating the cyclic glacial/interglacial pattern characteristic of late Quaternary high resolution stratigraphy in periplatform sediments.
During interglacial stages, the bank/shelf tops of the Nicaragua Rise were submerged. The northwestward flowing Caribbean Current swept neritic sediments off-bank to the periplatform environment where they accumulated, by settling through the water column or by sediment gravity flow, preferentially in downcurrent areas. These neritic sediments along with pelagic carbonates, form a thick wedge of highstand sediment on the upper slopes. Carbonate input was locally augmented by siliciclastic sediment input from Jamaica during peak sea-level highstands. Finally, neritic aragonite deposited in water depths below 1100 m was subject to partial dissolution.
Glacial sea-level lowstands were characterized by bank/shelf top exposure and lower production, therefore, neritic carbonate input to the periplatform environment was reduced. Nannoplankton productivity shows little glacial/interglacial variation, while glacial foraminifer productivity was only half interglacial levels. Consequently, bulk sediment accumulation rates and turbidite frequencies are lower during glacial stages than in interglacial stages. Bank-top exposure restricted flow of the Caribbean Current to seaways between the banks and shelves. This flow constriction considerably increased flow rates, winnowing sediments in areas of Walton Basin with water depths shallower than 600 m today. Partial dissolution of aragonite may be associated with the formation of magnesian calcite cements in current winnowed sediments.
The geometry of the late Quaternary sedimentary bodies, displayed on 3.5 kHz seismic lines, can be interpreted in a sequence stratigraphic framework for periplatform carbonate sediments. Lowstands are thin and overlain by thick accumulations of highstand sediments, all of which lap out on the steep bank/shelf margins. Transgressive systems tracts are too thin to be resolved on seismic data, but are revealed by subtle changes in interglacial sediment mineralogy
Tectonic and eustatic controls on the evolution of the Maldive carbonate platform
No full textThe Maldive Archipelago in the equatorial Indian Ocean is only the uppermost part of a more than 3-km thick carbonate platform. The Maldive platform contains a 50 Ma-long sedimentation record and has a relatively simple tectonic history. The interpretation of 6000 km of Shell 2-D seismic data and information from two industry and three ODP wells was the basis for the reconstruction of the platform evolution and assessment of controls on platform development.
The evolution of the Maldives platform was essentially twofold. During the first stage (Eocene-early Oligocene), tectonic control played the dominant role in the establishment and geographic distribution of shallow water carbonates. A series of shallow water carbonate platforms were formed in the early Eocene on basement highs separated by two deep, narrow, and continuous graben systems. The platforms aggraded and backstepped in the Eocene and early Oligocene in response to relative sea level rise driven mostly by tectonic subsidence.
The second stage of the platform evolution (late Oligocene-Quaternary) was predominantly controlled by sea level fluctuations. A significant fall in sea level at the early-late Oligocene transition, with a magnitude possibly up to a 100 m, was recorded in the paleo-bathymetry of the Shell ARI-1 well. In the late Oligocene and early Miocene, the platforms first aggraded, partially drowned, and later backstepped in response to a substantial long-term sea-level rise. At the end of the early Miocene, a series of aggrading flat top carbonate banks, a small remnant of the Eocene-Oligocene neritic carbonate system, were established on the periphery of the central basin, the predecessor of the modern Inner Sea of the Maldives. During the middle Miocene, the bank margins prograded for 10--15 km. The progradation was driven by five complete sea level cycles, with each cycle represented by a relative sea-level fall and a subsequent rise.
The reconstructed late Oligocene-middle Miocene relative sea level history of the Maldives corresponds well with the newly-published ice-volume record based on the temperature-corrected benthic foraminifera oxygen isotope data. The late Oligocene-middle Miocene depositional geometries of the Maldive platform appear to have recorded eustatic sea-level fluctuations
The Paleocene of La Concepcion Field (Maracaibo Basin, Venezuela): Transition from Andean to Caribbean active margin
No full textThe Paleocene Guasare Formation of La Concepcion Field (Maracaibo Basin, Venezuela) consists of thin carbonates that were deposited in a dynamic near-shore marine setting greatly influenced by terrestrial siliclastics and muds. In seismic data, the Guasare Fm. shows uniform thickness and subparallel reflectors. Facies trends were not evident from the 3D seismic data set. Amplitude maps revealed one structurally-related anomaly. The regional setting of the Paleocene was clarified showing that Late Cretaceous foresets indicated a source from the Andean active margin to the west. These clinoforms were overlain by the Paleocene Guasare Formation and its western partial equivalent, the Marcelina Fm., a siliciclastic and coal sequence. Only the overlying Eocene Misoa Formation indicates a northeasterly clastic input and eastward thickening associated with the emplacement of the Lara nappes of the Caribbean active margin. This study is based on 3D seismic data, some well logs, and well cuttings. Cores were unavailable
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