The Grenvillian Namaqua-Natal fold belt adjacent to the Kaapvaal Craton: 1. Distribution of Mesoproterozoic collisional terranes deduced from results of regional surveys and selected profiles in the western and southern parts of the fold belt. A Dept. of Geology, University of the Free State, Bloemfontein, South Africab Council for Geoscience, Pretoria, South Africa Received 13 December 2013, Revised 29 May 2014, Accepted 30 May 2014, Available online 23 June 2014 Choose an option to locate/access this article: Check if you have access through your login credentials or your institution Check access DOI: 10.1016/j.jafrearsci.2014.05.017 Get rights and content.
Jan Coetzer on Twitter: "Within a massive pegmatite vein #geology #kakamas... Coetzerjan : Students exploring for some ... Coetzerjan : Folded BIF's in a roadcut near ... The Role of Surface Oxygen in the Growth of Large Single-Crystal Graphene on Copper. The growth of high-quality single crystals of graphene by chemical vapor deposition on copper (Cu) has not always achieved control over domain size and morphology, and the results vary from lab to lab under presumably similar growth conditions.
We discovered that oxygen (O) on the Cu surface substantially decreased the graphene nucleation density by passivating Cu surface active sites. Control of surface O enabled repeatable growth of centimeter-scale single-crystal graphene domains. Ponded melt at the boundary between the lithosphere and asthenosphere : Nature Geoscience. Affiliations Department of Earth and Planetary Materials Science, Tohoku University, Sendai 980-8578, Japan Tatsuya Sakamaki, Akio Suzuki & Eiji Ohtani Department of Earth and Space Science, Osaka University, Osaka 560-0043, Japan Hidenori Terasaki Department of Earth Sciences, Okayama University, Okayama 700-8530, Japan Satoru Urakawa Japan Atomic Energy Agency, Hyogo 679-5148, Japan Yoshinori Katayama SPring-8, Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan Ken-ichi Funakoshi Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, USA Yanbin Wang Department of Earth and Planetary Science, University of California, Berkeley 94720, USA John W.
Hernlund Department of Geology and Geophysics, School of Ocean and Earth Sciences and Technology, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA Maxim D. Contributions T.S., S.U., A.S., E.O. and Y.K. performed the density measurements. Author details. Coetzerjan : Pseudotachylite induced by... Geology in Art. How mercury poisons gold miners and enters the food chain. 17 September 2013Last updated at 20:59 ET By Linda Pressly BBC Radio 4, Crossing Continents About 15% of the world's gold is produced by artisanal and small-scale miners, most of whom use mercury to extract it from the earth.
Coetzerjan : One of many pillow lavas exposed... Mining Journal - Northeast Africa and Middle East: Exploration potential. URANIUM EXPLORERS TARGET MILE 72 – Namib Times. Jade McClune: Following a long and drawn-out battle in the High Court, Metals Australia, now plans to start this month with exploratory drilling for uranium at the Mile 72 Prospect in the Erongo region.
Following the recent stand-off in the High Court, the mineral exploration company said that it eventually got the renewal of its environmental permit and that by last week it had raised US$500,000 through a placement of 5 million shares on the Australian Stock Exchange to fund its drill programme in the Erongo region. Its 4,000 metre reverse circulation drilling programme of 40 holes aims to test a number of targets to a depth of about 85 metres below surface, the company said. Ongoing exploration at Mile 72 was halted in 2008 when legal action was brought against Metals.
Psychedelic Rock: Wildly Colorful Geologic Maps of National Parks - Wired Science. One of the reasons I became a geologist was the maps.
Geologic maps are beautiful. I will never have enough walls in my house for all the geologic maps I'd love to hang. Coetzerjan : Brecciated contact between... What Lurks Beneath the Central Andes? - Wired Science. The view from the summit of Uturuncu in Bolivia, looking across the Altiplano-Puna Volcanic Complex.
What lies underneath the surface is one of the most volcanically-productive places on Earth. Image: Léo Guellec / Flickr. Portfolio. For sales enquiries please contact victoriaevansartist@gmail.com Glass aka Pele's Hair, oil on canvas, 200 x 200 cm Anthracite (Blind Coal), oil on canvas, 120cm x 90cm Gneiss, oil on canvas, 2012, 170cm x 140cm£2000 _________________________________________________________________'Limestone' oil on board, 2012, 40cm x 30cm - SOLD _________________________________________________________________
Palaeontology podcasts. Coetzerjan : Sandstone "dykes" - vertical... Coetzerjan : Volcanic neck - nestled in... Mineralsusesafety. Palaeontology podcasts. Precambrian Published on May 1st, 2013 | by Dave Marshall One of the most significant events in Earth’s history has been the oxygenation of its atmosphere 2.45–2.32 billion years ago.
Sciency Thoughts. Yosemite’s Iconic El Capitan Mapped in High-Resolution 3D. While many graduate students spend days in a lab or in front of a computer, Roger Putnam, a master's candidate at the University of North Carolina, spent up to three days at a time on the sheer face of a cliff, suspended thousands of feet above the ground.
The Bouma sequence and turbidite deposits. For a while now, the most popular page on my site has been this one , a photo of a Halloween pumpkin I carved to look like the Bouma sequence. Pavlof Volcano, Alaska Peninsula. Www.palaeontologyonline.com. Article: Fossil Focus > Fossil Focus: Trilobites. By Mark Bell *1 Introduction: Trilobites make up one of the most fascinating and diverse groups in the fossil record. Over the course of their long history — which dates back to near the beginning of the Cambrian period, around 520 million years ago — they have inhabited a wide range of marine environments, from reefs to abyssal depths.
In addition, trilobites have evolved several different life strategies, from burrowing to swimming; these are reflected in their varied appearances, or morphologies (Fig. 1). Several species, famously those from the Devonian period of Morocco (about 420 million to 360 million years ago), developed a rich array of protective spines, which has made them a popular choice among fossil collectors and dealers. Figure 1 — Key trilobite species discussed in the text. Cooling of the Bushveld Complex, South Africa: Implications for paleomagnetic reversals. Igneous rocks record the direction of the Earth’s magnetic field as they cool through their Curie temperature. The Charm of Columns. Devil’s Postpile (US), Fingal’s Cave (UK), Giant’s Causeway (Ireland) – these are nature’s beauties because of their spectacular columns.
Mapping the Geology of Skyrim. If you have been following this project you will know that I am attempting to develop a mod for the popular video game The Elder Scrolls V: Skyrim. The mod is meant to be educational – but not in a conventional sense. I want people to play it and not feel like they are being forced to learn something, rather for people to play it because they want to and in the process of the game realise that there is something useful here.
For more information on this project and its background check out my initial post, my set at Science Showoff and also where I am hosting the project over at Dark Creations - with a detailed project outline. Element of the week: francium. This week's element is francium, which has the symbol Fr and the atomic number 87. Francium is a highly radioactive alkali metal that is vanishingly rare in the wild. Some facets of the geology of diamonds. The ‘Picasso diamond’ shows complex growth patterns highlighted by cathodoluminescence. The Traveling Geologist: The Moine Thrust. Africa's Rift Valley from above – in pictures. The Most Dangerous (Man-Made) Lava Flow. One of the things I enjoy most is running across fascinating information when I’m not even looking for it. Case in point, today’s subject.
I was doing some research for my class on Fukushima Dai’ichi and Chernobyl when I ran into some references to lava. Photos du journal. Photos du journal. Dripping Honey Explained. +Enlarge image. Mining makes your life possible. Stromatolites.
Structural Geology. Geochemistry. On the mechanism of exfoliation of ‘Vermiculite’ © The Mineralogical Society ↵* E-mail: stephen.hillier@hutton.ac.uk. GSA Publications - Data Repository. Select Year … Data Repository items are published exactly as provided by the author; these items are not formatted or edited. For further information about any Data Repository item, please contact the author. Download electronic copies (PDF format) from our FTP site. ScienceWorld. Optical Mineralogy and Petrography. David W. Mogk, Dept. of Earth Sciences, Montana State University This webpage provides a compilation of on-line instructional resources and teaching activities related to Optical Mineralogy and Petrography. This site is intended for a) students, who desire to review the principles and methods of optical mineralogy and petrography, and b) faculty who seek instructional materials and activities to support their own teaching of these subjects.
Mineralogy Database.