829 research outputs found
Reconstruction of Madagascar and Africa: evidence from the Davie Fracture Zone and Western Somali Basin
No full textNew seismic reflection, gravity, and magnetic data from offshore East Africa allow the Davie Fracture Zone to be traced from ?11°S to its intersection with the Kenyan coast at ?2°S, constraining the relative motion of Madagascar and Africa. Seasat-derived free air gravity anomalies and slope/rise positive magnetic anomalies observed in shipboard data help to locate the continent-ocean boundaries (COB) off the shore of East Africa and Madagascar. Seismic reflection data further document a diapirprovince off Madagascar, presumably conjugate to that observed off Kenya and Somalia. The Dhow and Very Large Crude Carrier (VLCC) basement ridges are complex features and do not appear to be simple fracture zones owing their existence entirely to the separation of Madagascar and Africa. From these data we determine a predrift fit of Madagascar and Africa involving a 14.2° rotation of Madagascar to Africa about a pole at 10°N, 150°E. The geometry of the reconstruction adheres to seismic and potential field data indicating the oceanic nature and extent of the Comoros Basin and of the Somali Basin between Kenya and the Seychelles, and it does not conflict with onshore or offshore stratigraphy. Timing of the opening of the Western Somali Basin is constrained by Mesozoic marine magnetic anomalies and extrapolation to the interpreted COB and occurred between approximately 165 and 130 Ma. <br/
Theology in suspense : how the detective fiction of P.D. James provokes theological thought
No full textElectronic redacted version excludes material for which permission has not been granted by the rights holderThe following dissertation argues that the detective fiction of P.D. James
provokes her readers to think theologically. I present evidence from the body of
James’s work, including her detective fiction that features the Detective Adam
Dalgliesh, as well as her other novels, autobiography, and non-fiction work. I also
present a brief history of detective fiction. This history provides the reader with a
better understanding of how P.D James is influenced by the detective genre as well as
how she stands apart from the genre’s traditions.
This dissertation relies on an interview that I conducted with P.D. James in
November, 2008. During the interview, I asked James how Christianity has
influenced her detective fiction and her responses greatly contribute to this
dissertation. However, James’s novels should be interpreted and explored in the
manner that they are received by the reader. How the reader receives and responds to
the novels, not only how James writes the novels, is what causes her stories to
provoke theological thinking.
By examining Christian symbolism that is present in setting, character, the
Detective Adam Dalgliesh, and plot, this dissertation seeks to assert that James
contributes to a theological conversation through her popular detective fiction
The Mesozoic East African and Madagascan continental margins: stratigraphy and tectonics
No full textSalt diapirs bordering the continental margin of northern Kenya - southern Somalia
No full textThe presence of newly discovered diapirs of presumed salt origin is documented for the continental margin of northeastern Kenya and southeastern Somalia. These structures are probably a manifestation of a significant thickness of Lower Jurassic evaporites deposited during the rift and early-drift stages of the separation of Madagascar from the African continent
Erratum: Allen, G.R., Erdmann, M.V. & Purtiwi, P.D. (2017): Author Purtiwi, P.D. is spelled Pertiwi, P.D.
No full textAllen, G.R., Erdmann, M.V. & Purtiwi, P.D. (2017) Descriptions of four new species of damselfishes (Pomacentridae) in the Pomacentrus philippinus complex from the tropical western Pacific Ocean. Journal of the Ocean Science Foundation, 25, 47–76.
corrected spelling of third author’s name to:
Allen, G.R., Erdmann, M.V. & Pertiwi, P.D. (2017) Descriptions of four new species of damselfishes
(Pomacentridae) in the Pomacentrus philippinus complex from the tropical western Pacific Ocean. Journal of the Ocean Science Foundation, 25, 47–76
The separation of Madagascar and Africa
No full textIdentification of a sequence of east-west trending magnetic anomalies of Mesozoic age in the western Somali Basin helps define the position of Madagascar in the Gondwana reconstruction. The anomalies are symmetric about ancient ridge segments and are flanked to the north and south by the Jurassic magnetic quiet zone. The motion of Madagascar relative to Africa was from the north and began in the middle Jurassic, about the same time as the initial breakup of Gondwanaland. Sea-floor spreading ceased when Madagascar assumed its present position in the Early Cretaceous.<br/
Crustal structure in the Western Somali Basin
No full textAs part of integrated marine geophysical studies in the Western Somali Basin, we performed 118 sonobuoy experiments to define better the crustal structure of the margins and basin created by the separation of Madagascar and Africa. After using T2/X2, conventional slope-intercept methods, and slant-stacked t-p techniques to analyse the data, we combined our solutions with all previous velocity information for the area. Velocity functions were derived for the sediment column, and we detected a high-velocity (4.58 ± 0.29 km s–1) sediment layer overlying acoustic basement. We confirmed that the crust is indeed seismically oceanic, and that it may be considered either in terms of a layered model – layers 2B (5.42 ± 0.19 km s–1), 2C (6.23 ± 0.22 km s–1), 3 (7.03 ± 0.25 km s–1), and mantle (7.85 ± 0.32 km s–1) were identified – or a more complex gradient model in which layer 2 is marked by a steeper velocity gradient than underlying layer 3. Integrated igneous crustal thicknesses (1.62 ± 0.22 s, 5.22 ± 0.64 km) are significantly less than what is considered normal. We present a revised seismic transect across the East African margin, as well as total sediment thickness, depth to basement and crustal thickness maps.<br/
Re: Nickel chromium and iron levels in the saliva of patients with simulated fixed orthodontic appliances
No full text- …
