The internal architecture of a beach system can provide clues into the processes involved in its formation, including depositional processes, and/or driving mechanisms (Billy et al., 2014). Several unique events such as cold fronts or Hurricane Irma caused conditions that resulted in erosion and accretion changes in Red Reef Beach - Boca Raton, throughout the year of 2017. Since the lateral extent of these changes is difficult to evaluate using traditional methods such as coring, a Ground P...

Rita Costa San Miguel Bento Cavalcante

No description available.

Barnes, Brian B.

The behaviors of oyster larvae are difficult to monitor or experimentally manipulate, especially in field conditions. As a result, little is known of the fate of oysters in the larval portion of their life cycle, prior to recruitment. At the transition from pelagic larvae to benthic adults, larvae are likely to come into contact with many invertebrates resident on oyster reefs. Of these, fouling epifauna are generally believed to reduce the settlement of interspecific larvae through competitive ...

Burke, Russell Paul

Oyster shell for native oyster reef restoration is scarce in Chesapeake Bay and other estuaries (Chapter 1). Consequently, alternative substrates merit consideration in oyster restoration. This dissertation examines the suitability of shell alternatives, including granite, concrete, limestone marl, concrete modules and reefballs with reef surveys and experiments in the Rappahannock and Lynnhaven Rivers of Chesapeake Bay. Oyster recruitment, growth, survival, density, biomass, condition, and dise...

Maddox, Elizabeth D.

No description available.

DeAlteris, Joseph T.

Wreck Shoal is a subtidal oyster reef area located in the James River, Virginia. Two significantly different types of oyster reefs are found in adjacent areas on Wreck Shoal. Hard-rock reefs are characterized by a relatively thick oyster shell layer, higher densities of live oysters, a coarser interstitial sediment, and a negligible sediment cover. In contrast, mud-shell reefs are characterized by a very thin osyter shell layer, considerably lower densities of live oysters, a finer interstitial ...

The unique coral reef at St. Lucie Reef (Stuart, FL) persists despite environmental variability from extensive freshwater discharges, summer upwelling, and thermal instability. By examining the symbiotic zooxanthellae, or Symbiodinium, that reside in corals, we can gain insight to coral physiology impacted by local stressors. Two scleractinian corals, Montastraea cavernosa and Pseudodiploria clivosa were sampled over 1.5 years, including both wet and dry seasons. Zooxanthellae were isolated ...

The Florida Reef Tract in Southeast Florida is made up of hard-bottom formations. The shape and size of the tract is constantly changing. One major factor contributing to these changes is the movement of sand. This is influenced by location-based, human-induced, and natural factors. These shifting sands cover or uncover reef structure. Images of the Florida Reef Tract in Palm Beach County were analyzed by the Department of Geosciences at Florida Atlantic University, using a partially automated m...

Chanderman, Lisa

A Dissertation submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in fulfilment of the requirements for the Degree of Masters in Engineering by research only and to the Stochastic Mine Planning Laboratory, McGill University as part of the COSMO scholarship in Mine Planning under uncertainty Johannesburg, 2017 / This dissertation discusses the use of stochastic orebody modelling techniques for assessing geological uncertainty associated with gold ...

Mandingaisa, Omberai

A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science in Engineering, 2018 / In bord and pillar mining, pillar stability is a key element of the mining process. This is usually underpinned by successful adherence to planned mining stope width. Stope width control is the backbone to the grade control process in platinum mines on the great Dyke...

Zhao, Baojin

A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy, / The Ventersdorp Contact Reef(VCR) is a major gold-bearing reef in the Witwatersrand Basin. It occurs between the overlying Klipriviersberg Group lavas and the underlying Central Rand Group sediments, and was strongly altered by hydrothermal fluids circulating in the Witwatersrand Basin. A detailed study of the mineralogy, ge...

Chamberlain, Vaughan Andrew

A project report submitted to the Faculty of Engineering, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Science in Engineering. Johannesburg, 1997. / Due to the extreme costs of establishing new shaft systems in Witwatersrand gold mines it is essential that the resource estimation is optimised, The result of poor Of sub-optimal estimation could be catastrophic even.to the largest of mining companies. This project examines the applica...

Pearton, Selwyn

Pumpable emulsion explosives have been available to surface and underground massive mining operations for decades and through their unique properties offer significant advantages through improved safety, reliability and performance. Despite their advantageous properties the benefits of pumpable emulsions have been unavailable to narrow reef mining operations due to the void in technology necessary for their successful implementation within the challenging environment. The purpose of the fo...

Sebola, Tlou Piet

A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. 23 September, 2014, Johannesburg. / The Witwatersrand Basin has been mined for the last 125 years and is still one of the world’s largest producers of gold and has produced over 50 000 tonnes. However, uranium has also been mined as a by-product of gold from the Witwatersrand reefs, and over 150 000 tonnes have been produced. Over t...

Musingwini, Cuthbert

The Bushveld Complex in South Africa is a geological formation that hosts approximately 87% of all the known world platinum group metal (PGM) resources and reserves. It produces about 77% of the world’s primary platinum production. However, the sheer size of the resources and reserves obscures the fact that the PGM mineral resources are a wasting asset, and should therefore be extracted optimally in order to ensure sustainable production. In addition, a 2006 survey of research and developme...

Norman, Mxolisi Vincent

This thesis investigates the representation of Coloured identities on the Johannesburg Reef. The study proceeds from the premise that colonial /apartheid apprehensions of the Coloured subject were significantly limited to the physicality of the body. Central to such apprehensions were dominant ideologies which served to propagate socio-political control. Representations of, and resultant discourses on Coloured identities often reproduce this colonial/apartheid racial imaginary. Contemporary mean...

McQuaid, Kirsty Alexandra

Includes bibliographical references. / Zandvlei is a small, seasonally closed, urban estuary situated 20 km south of Cape Town, and been subjected to many physical changes, including the construction of a rubble weir, canalisation of the Estuary mouth, construction of a marina and hardening of the banks with concrete. These changes have facilitated the expansion of an invasive reef-building polychaete, Ficopomatus enigmaticus. This study quantifies long term changes in the abundance of F. enigma...

Suchy, Daniel R

Vita. / Digitized by Kansas State University Libraries / Department: Geology.

Opoubou-Lando, Serge-Driver

Thesis (MSc (Earth Sciences))--University of Stellenbosch, 2010. / ENGLISH ABSTRACT: The Bushveld Complex of South Africa contains three of the most important platinum deposits in the world namely the Merensky Reef, the Upper Group Two (UG2) chromitite reef and the Platreef. These three ore bodies are principally beneficiated by froth flotation. During the beneficiation of chromite hosted PGE’s by froth flotation, chromite represents the principal gangue mineral. This is particularly true fo...

Johnson, Craig Michael

Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2009. / Multi purpose reefs are a relatively new concept that incorporate functionalities of beach stabilization, breakwater/seawall protection, biological enhancement and recreational amenity. Economic benefits increase their attractiveness. There is, however, some degree of uncertainty in design guidelines as to the predictability of each of these aspects. With regards to recreational amenity enhancement, one such uncertainty...

Barker, Victoria Anne

The northern Gulf of Mexico (GOM) contains approximately 2,500 oil and gas platforms, resulting in one of the largest de facto artificial reef systems in the world. As of 2013, 1,227 additional structures had ceased to produce oil and gas and have been decommissioned and removed. While active platforms are lit by high-pressure mercury vapor lights, inactive platforms are only minimally lit for navigation. The positively phototaxic behavior of many fish species causes lit oil platforms to act as ...

Lawrence, Cloverley

Includes bibliographical references (pages 49-58). / Subtidal reef communities in KwaZulu-Natal (KZN), South Africa are poorly known. This lack of knowledge is problematic as the biodiversity of these reefs may be severely impacted and inadequately conserved. This study documents and describes subtidal benthic communities occurring on reefs at four depth categories along the whole length of the coast. A distinct difference between northern reefs from those in the south and central parts of the p...

Christiana, David.

The water resources of the Capitol Reef National Park area include the middle Fremont River, other perennial and ephemeral watercourses, isolated springs, tinajas, and lakes fed by precipitation on surrounding plateaus, as well as ground water in alluvial, basalt, and sedimentary aquifers fed by recharge from precipitation and stream channel losses. The difference between streamflows at Bicknell (79.2 million m³/yr) and Caineville (67.8 million m³/yr) can be attributed to evapotranspiration by r...

Muruven, Dean Nalandhren

Surface water pollution is prevalent in numerous areas of central Roodepoort mainly due to gold mining activities. The surface water quality for the Bosmontspruit, Russell’s Stream and the New Canada Dam was assessed from October 2010 to March 2011. Physical, chemical and biological characteristics of the water were determined for 8 monitoring points and the results obtained were compared with the In-stream water quality guidelines for the Klip River catchment and the South African Water Q...

O'Donovan, Anthony Gareth

The Vaal Reef placer is situated on the unconformable junction of the Strathmore and Stilfontein formations of the Johannesburg Subgroup. Within the South Division of the Vaal Reefs Exploration and Mining company lease, the Vaal Reef Placer is shown to be composed of several different units. Each unit exhibits its own specific characteristics and trend direction which can be used to establish distinct "Reef packages". These packages can be mapped in such a way as to provide a preliminary lithofa...

Tietbohl, Matthew

Herbivorous coral reef fishes play an important role in helping to structure their environment directly by consuming algae and indirectly by promoting coral health and growth. These fishes are generally separated into three broad groups: browsers, grazers, and excavators/scrapers, with these groupings often thought to have a fixed general function and all fishes within a group thought to have similar ecological roles. This categorization assumes a high level of functional redundancy within herbi...

Brough, Christopher

Includes abstract. / Includes bibliographical references (p. 107-114). / This dissertation has investigated the links between the mineralogical characteristics of the Normal, NP2 and P2 Merensky reefs at Northam Platinum Ltd and their flotation performances. Flotation performance was measured in terms of the grade and recovery of the base metal sulphides (chalcopyrite, pentlandite, pyrrhotite and total sulphide) as well as through investigation of mass-water recoveries.

Shivambu, Steven

Historically, placers of economic importance at Sibanye Gold's Beatrix No. 3 Shaft were Beatrix Reef, Aandenk Reef and Composite of the two reefs. Recently, the VS5 placer has emerged to be a significant contributor of ore tonnages mined on the Shaft as mining advances into deeper levels towards the northern portion of the mine lease area. Gold concentration in the VS5 Reef is highly variable from uneconomic, through marginal to economic gold values. A good knowledge of the sedimentological fram...

Logan, Ryan K.

<p> Artificial reefs (ARs) have been used around the globe for a number of years with the goal of enhancing local fish populations, species diversity and fishing opportunities for commercial and recreational fishers. However, central to the problem of quantifying AR productivity for mobile species is knowing when and for how long they are resident to the AR, and connectivity with adjacent natural habitats. To address this, 45 Kelp Bass (KB), Barred Sand Bass (BSB) and California Sheephead (SH) w...

Tibane, Lowanika Victor

The approximately 2.9 Ga old Witwatersrand Basin of South Africa hosts different types of pyrite grains. The pyrite grains are hosted in different quartz pebble conglomerate reefs including the Ventersdorp Contact Reef (VCR). The various reefs are accessible from numerous goldfields. Regardless of years of studying the various types of pyrite grains from the VCR, there is still a disagreement as to their origins. Numerous pyrite grains of different types, shapes, and textures have been identifie...

Jarman, Annamart

The Twickenham Platinum Mine (TPM) Project is located in the north eastern limb of the Bushveld Complex, north west of Steelpoort in the Limpopo Province. The property hosts platinum group metals (PGM) mineralisation in the Merensky Reef (MR) and Upper Group 2 Chromitite (UG2). The two reefs are separated by 400 m of mafic and ultramafic rocks of the Rustenburg Layered Suite. The question that must be answered with this study relates to the economic viability of the MR compared to that of ...

Blamey, Nigel John Frederick

The "A" -Reef occurs within the Aandenk Formation of the Central Rand Group, Witwatersrand Supergroup, in the Welkom Goldfield. It comprises the Witpan and Uitsig Reefs which are both oligomictic conglomerates, and are exploited for their gold content by Anglo American Corporation. The main Witpan channel complex is orientated in a NW-SE direction and occurs close to No.3 Shaft of Western Holdings Mine where it is currently being mined. The Witpan Reef varies in thickness from 7-220cm, with late...

Gong, Xianzhe

The dinoflagellate genus Symbiodinium is a popular research topic in the coral reef molecular biology field. Primarily because these organisms serve as the coral holobiont’s primary source of energy, carrying out photosynthesis, and providing hydrocarbons to the coral host. Previous studies have shown the difficulty of isolating Symbiodinium as well as the inherent problems in trying to quantify the diversity of this genus and to qualify the distinct reactions of different Symbiodinium sp. to ch...

Tomascik, Tomas.

No description available.

Grobe, M.

No description available.

Copertino, Margareth.

Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 2002. / Includes bibliographical references (leaves 235-258).

Wegener, Joanne E.

Thesis (B.A.(Hons.))--University of Adelaide, Dept. of Geography, 1996? / Includes bibliographical references (leaves 76-79).

Christiana, David.

Thesis (Ph. D.)--University of Arizona, 1991. / Includes bibliographical references (p. 174-179).

Maher, Marie A. Bonem, Rena Mae.

Thesis (M.S.)--Baylor University, 2007. / Includes bibliographical references (p. 90-92).

Weisz, Jeremy Brian. Lindquist, Niels Lyle

Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2006. / Title from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Marine Sciences." Discipline: Marine Sciences; Department/School: Marine Sciences.

Morris, Nicole Marie Brown.

Thesis (M.S.)--University of West Florida, 2007. / Title from title page of source document. Document formatted into pages; contains 150 pages. Includes bibliographical references.

Cerveny, Kassandra.

Thesis (M.S.)--University of Puerto Rico, Mayaguez Campus, 2006. / Includes bibliographical references.

Vroom, Peter S.

Thesis (Ph. D.)--University of Hawaii at Manoa, 2001. / Includes bibliographical references. Also available on microfiche.

Figueiredo Porto Neto, Fernando de.

University, Diss., 2003--Bremen.

Dürr, Simone.

University, Diss., 2003--Kiel.

Hyde, John R.

Thesis (Ph. D.)--University of California, San Diego, 2007. / Title from first page of PDF file (viewed June 21, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.

Krivanek, Joseph G.

Thesis (M.A.)--University of South Florida, 2006. / Title from PDF of title page. Document formatted into pages; contains 64 pages. Includes bibliographical references.

Daley, Benjamin.

Thesis (Ph.D.) - James Cook University, 2005. / Typescript (photocopy) Bibliography: p. 511-553.

Burton, Andrew Joseph,

Thesis (M. Sc.), Memorial University of Newfoundland, 1999. / Bibliography: p. 175-180. Also available online.

Shiell, Glenn Raymond.

Thesis (Ph.D.)--University of Western Australia, 2006.