Department of Geology Newsletter No. 10, July 1961
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Fault Formation at Impact Craters in Porous Sedimentary Rock Targets W.R
40th Lunar and Planetary Science Conference (2009) 1073.pdf FAULT FORMATION AT IMPACT CRATERS IN POROUS SEDIMENTARY ROCK TARGETS W.R. Orr Key1 and R.A. Schultz, Geomechanics-Rock Fracture Group, Department of Geological Sciences and Engineer- ing/172, Mackay School of Earth Sciences and Engineering, University of Nevada, Reno, NV 89557-0138, [email protected]. Summary: We present results of a study in which provides a unique opportunity to compare the mechan- the mechanics of faulting at high strain rates in porous ics of faulting at high and low strain rates. sedimentary rocks were evaluated at the Upheaval Results and Implications: It was decided that Dome impact crater in southeast Utah. We find that at faults would be evaluated within the Navajo Sandstone high strain rates, deformation band damage zones are and the rim syncline of the crater because mechanical absent and instead a cracking-dominated behavior gen- observations relating to fault formation are best ob- erating pulverized rock occurs. Using the measured served where offsets on the faults are minimal. Two of grain sizes of the pulverized rock, strain rates under these faults were identified for field investigation which this material formed are ~ 103 s-1. within the rim syncline of Upheaval Dome and are Introduction: Faulting in porous sedimentary shown in Figure 1. By contrast, offsets within the cen- rocks subjected to typical tectonic strain rates has been tral uplift at Upheaval Dome [10] are too great to allow extensively studied [1-3]. These studies have shown for the mechanical observations required for this study. that the strain is first accommodated by a localized reduction of porosity resulting in the formation of in- dividual deformation bands and as the strain continues to accumulate, deformation band damage zones (DBDZs) develop [2]. -
"First Report on the State of the World's Animal Genetic Resources"
Country Report of Australia for the FAO First Report on the State of the World’s Animal Genetic Resources 2 EXECUTIVE SUMMARY................................................................................................................5 CHAPTER 1 ASSESSING THE STATE OF AGRICULTURAL BIODIVERSITY THE FARM ANIMAL SECTOR IN AUSTRALIA.................................................................................7 1.1 OVERVIEW OF AUSTRALIAN AGRICULTURE, ANIMAL PRODUCTION SYSTEMS AND RELATED ANIMAL BIOLOGICAL DIVERSITY. ......................................................................................................7 Australian Agriculture - general context .....................................................................................7 Australia's agricultural sector: production systems, diversity and outputs.................................8 Australian livestock production ...................................................................................................9 1.2 ASSESSING THE STATE OF CONSERVATION OF FARM ANIMAL BIOLOGICAL DIVERSITY..............10 Major agricultural species in Australia.....................................................................................10 Conservation status of important agricultural species in Australia..........................................11 Characterisation and information systems ................................................................................12 1.3 ASSESSING THE STATE OF UTILISATION OF FARM ANIMAL GENETIC RESOURCES IN AUSTRALIA. ........................................................................................................................................................12 -
Terrestrial Impact Structures Provide the Only Ground Truth Against Which Computational and Experimental Results Can Be Com Pared
Ann. Rev. Earth Planet. Sci. 1987. 15:245-70 Copyright([;; /987 by Annual Reviews Inc. All rights reserved TERRESTRIAL IMI!ACT STRUCTURES ··- Richard A. F. Grieve Geophysics Division, Geological Survey of Canada, Ottawa, Ontario KIA OY3, Canada INTRODUCTION Impact structures are the dominant landform on planets that have retained portions of their earliest crust. The present surface of the Earth, however, has comparatively few recognized impact structures. This is due to its relative youthfulness and the dynamic nature of the terrestrial geosphere, both of which serve to obscure and remove the impact record. Although not generally viewed as an important terrestrial (as opposed to planetary) geologic process, the role of impact in Earth evolution is now receiving mounting consideration. For example, large-scale impact events may hav~~ been responsible for such phenomena as the formation of the Earth's moon and certain mass extinctions in the biologic record. The importance of the terrestrial impact record is greater than the relatively small number of known structures would indicate. Impact is a highly transient, high-energy event. It is inherently difficult to study through experimentation because of the problem of scale. In addition, sophisticated finite-element code calculations of impact cratering are gen erally limited to relatively early-time phenomena as a result of high com putational costs. Terrestrial impact structures provide the only ground truth against which computational and experimental results can be com pared. These structures provide information on aspects of the third dimen sion, the pre- and postimpact distribution of target lithologies, and the nature of the lithologic and mineralogic changes produced by the passage of a shock wave. -
BJD Management Options Analysis and Economic Report
Summary of factors and costs associated with different bovine Johne’s disease management options in Queensland January 2014 This publication has been compiled by the Department of Agriculture, Fisheries and Forestry. © State of Queensland, 2014. The Queensland Government supports and encourages the dissemination and exchange of its information. The copyright in this publication is licensed under a Creative Commons Attribution 3.0 Australia (CC BY) licence. Under this licence you are free, without having to seek our permission, to use this publication in accordance with the licence terms. You must keep intact the copyright notice and attribute the State of Queensland as the source of the publication. For more information on this licence, visit http://creativecommons.org/licenses/by/3.0/au/deed.en The information contained herein is subject to change without notice. The Queensland Government shall not be liable for technical or other errors or omissions contained herein. The reader/user accepts all risks and responsibility for losses, damages, costs and other consequences resulting directly or indirectly from using this information. Executive Summary The Department of Agriculture Fisheries and Forestry (DAFF) began work in January 2013 on a Scenario analysis for the management of Bovine Johne’s Disease in Queensland (Scenario Analysis, Attachment 1) as part of its normal response to a disease or natural disaster. The Queensland cattle industry asked the Queensland Government for information to help them assess different bovine Johne’s disease (BJD) management options. In June 2013, the early findings of the Scenario Analysis were discussed by Dr Jim Thompson in an industry forum. -
Deformation Styles at Upheaval Dome, Utah Imply Both Meteorite Impact and Subsequent Salt Diapirism
41st Lunar and Planetary Science Conference (2010) 1969.pdf DEFORMATION STYLES AT UPHEAVAL DOME, UTAH IMPLY BOTH METEORITE IMPACT AND SUBSEQUENT SALT DIAPIRISM. R. G. Daly and S. A. Kattenhorn, University of Idaho Department of Geo- logical Sciences ([email protected]; [email protected]). Introduction: Upheaval Dome is a ~5.5 km wide that diapirism may have had an influence on the de- circular topographic depression in Canyonlands Na- formation present at the dome. tional Park, Utah (Fig. 1). Upturned beds around the Observations: Field work has focused on observ- feature indicate a structural dome located above salt ing brittle deformation in and around the ring syncline. layers in the Pennsylvanian aged Paradox Formation. This area is pervasively deformed and as such affords Its ambiguous origin, either as a salt diapir or a mete- many varied examples of brittle failure. This work orite impact, has been debated for the last 75 years. complements the extensive research done in the central Recently, planar deformation features (PDFs) were uplift of the dome [6]. Many different morphologies discovered at the dome. Based on current field work are present, such as joints, deformation bands, and we propose two methods of deformation present at the shear fractures. There is also variation within each dome: meteorite impact and subsequent salt diapirism. morphology. Many shear fractures are planar and regu- Based on field and aerial photograph analysis, we larly spaced; however, there are also many sets with a have identified and characterized both dynamic and distinct curvilinear shape, the orientation of which slowly-formed deformation features around the dome. -
A Novel Geomatics Method for Assessing the Haughton Impact Structure
Meteoritics & Planetary Science 1–13 (2020) doi: 10.1111/maps.13573-3267 Electronic-Only Article A novel geomatics method for assessing the Haughton impact structure Calder W. PATTERSON * and Richard E. ERNST Department of Earth Sciences, Ottawa Carleton Geoscience Center, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada *Corresponding author. E-mail: [email protected] (Received 22 July 2019; revision accepted 22 August 2020) Abstract–Terrestrial impact structures are typically modified by erosion, burial, and tectonic deformation. Their systematic morphologies are typically reconstructed through a combination of geological and topographic mapping, satellite imagery, and geophysical surveys. This study applies a novel geomatics approach to assessment of the morphology of the extensively studied Haughton impact structure (HIS), Devon Island, Nunavut, in order to test its potential to improve the accuracy and quality of future impact structure reconstruction. This new methodology integrates HIS lithological data, in the form of digitized geologic mapping, with a digital elevation model, within diametrically opposed, wedge-shaped couplets, and plots these data as pseudo cross sections that capitalize on the radial symmetry of the impact structure. The pseudo cross sections provide an accurate reconstruction of the near- surface stratigraphic sequences and terraces in the faulted annulus of the modified crater rim. The resultant pseudo cross sections support current interpretations regarding the 10–12 km diameter of the transient cavity, and successfully reproduce the visible outer ring and intermediate uplifted zone within the central basin. Observed positions of vertical offsets suggest that the extent of impact deformation extends beyond the current estimates of the apparent crater rim to radial distances of between 14 and 15 km. -
NAP.OP8 Final Report
/:>"", MEAT & LIVESTOCK Table of Contents Prefuce ______________________________________________________________ 3 Session l:BullFertility& Management .. _~~~~~~~~~~~=~==~~4 An Overview 4 The Bull Power Project 7 Prepuce, Testicular And Other Physical Traits 10 Semen Traits 16 Serving Capacity Tests 22 Calf Output And Predictors Of Fertility Of Bulls In Multiple-Sire Herds 29 Bull:Female Ratios 36 Social Behaviour of Bulls 43 Session 2: Breeder Fertility & Management 49 Development of a Yearling Mating Program for Areas ofImproved Nutrition 49 Heifer and Breeder Management 54 Improving Cost-effectiveness of Supplementation Systems for Breeder Herds 64 Session 3: Reproductive Disease 73 Brief Review ofInfectious Causes of Reproductive Failure in Beef Herds 73 Diseases Affecting Reproductive Performance in Central and Nth Q1d Beef Herds 77 Session 4: Control o/Cyclicity & Pregnancy Prevent 83 Introduction of Willis Dropped Ovary Technique for Oestrus Control in Cattle 83 GnRH Agonist Bioimplants for Control of Reproduction inHeifers & Cows 87 Session5: Genetics 93 The Role of Artificial Breeding in the Northern Cattle Industry 93 Maximising Heterotic Advantage Using Systematic Crossbreeding 96 Crossbreeding Project within Meat Quality CRC 103 Straightbreeding Project within Meat Quality CRC 120 Meeting Post Weaning Market Specifications in Live Cattle Export Trade With SE Asia. __ 131 Molecular Genetics Project - Meat Quality CRC 147 Session 6: Technology Transfer & Adoption 154 BREEDPLAN - Tropical Breeds Technical Officer 154 Beef Genetic -
Terrestrial Impact Structures and Their Confirmation: Example from Dhala Structure, Central India
e-Journal Earth Science India, Vol.2 (IV), October, 2009, pp. 289 - 298 http://www.earthscienceindia.info/; ISSN: 0974 - 8350 Terrestrial Impact Structures and their Confirmation: Example from Dhala Structure, central India J. K. Pati1, K. Prakash2 and R. Kundu1 1Department of Earth & Planetary Sciences, Nehru Science Centre, University of Allahabad, Allahabad, India 2Department of Geology, Banaras Hindu University, Varanasi, India Email: [email protected]; [email protected] Abstract Although seventy percent of the Moon surface area is covered by meteoritic impact structures only 176 confirmed impact structures known on Earth hitherto. In India, the recently discovered Dhala impact structure, M.P. and the Lonar crater, Maharastra are the only two confirmed impact structures. The simple, complex and multi-ring impact structures are confirmed on the basis of mesoscopic and microscopic shock metamorphic features besides the physical and/or chemical signature(s) of the impactor (meteorite). The role of bolide impacts in the formation of mineral deposits and playing a crucial role in some of the major mass extinction events is also well known. The impact cratering process is considered responsible for the planetary evolution, landscape modification, and the presence of water and life on Earth. Introduction Bolide impact structures broadly cover the surfaces of planetary bodies in the solar system (Taylor, 1992) but predominantly occur in the planets of the inner solar system, their moons and asteroids. Nearly 70% of the Lunar surface is covered by impact structures. However, these are rare features on the surface of the planet Earth and only 176 structures are currently known (http://www.unb.ca/passc/ImpactDatabase/Age; October 10, 2009) as confirmed impact structures. -
Feedback: Your Levies at Work August 2013
Your levies at work // August 2013 Setting the standard 28// A supply chain focused on MSA 06// Racking up demand Strategies to grow the market for lamb in the US 12// EverGraze regional packages released 16// Taking the bite out of Australia’s wild dog problem 26// Helen Springs PDS Measuring genetic impacts Feedback: Your levies at work August 2013 A note from the MD... roducers across the north continue economies of China and the Middle East to endure severe drought (see pages 6–7). P conditions, with the wet season A serious issue impacting the lamb industry still several months away. However, the in Australia is wild dogs. Featured in this recent good rainfall across most of the edition of Feedback are some examples of south eastern states has lifted confidence how your levy funds are invested into and slowed turnoff, easing the pressure co-operative research centres (CRCs) – on livestock prices. specifically the Invasive Animals CRC to The 2012-13 financial year ended with the reduce the impact of wild dogs. It is the highest recorded export volumes - over one collective investment of funds that make it million tonnes of beef and 200,000 tonnes possible to undertake these large-scale of lamb. The high volumes were largely research projects for the benefit of the driven by increased production due to the whole industry. dry conditions; however, also reflect the Your comments are welcome growing demand for Australian red meat [email protected] across the globe. A feature in this edition covers one of our key focus areas - growing global demand for Australian lamb. -
The Ries-Steinheim Crater Pair and Two Major Earthquakes – New Discoveries Challenging the Double-Impact Theory
The Ries-Steinheim crater pair and two major earthquakes – New discoveries challenging the double-impact theory Elmar Buchner ( [email protected] ) University of Applied Sciences Neu-Ulm Volker Sach Meteorkratermuseum Steinheim Martin Schmieder USRA, Houston, Texas Article Keywords: impact-earthquakes, Nördlinger Ries, Steinheim Basin Posted Date: July 27th, 2020 DOI: https://doi.org/10.21203/rs.3.rs-43745/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/24 Abstract The Nördlinger Ries and the Steinheim Basin are widely perceived as a Middle Miocene impact crater doublet. We discovered two independent earthquake-produced seismite horizons in North Alpine Foreland Basin deposits. The older seismite horizon,associated with the Ries impact is overlain by in situ-preserved distal impact ejecta, forming a unique continental seismite-ejecta couplet within a distance up to 180 km from the crater. The younger seismite unit, also triggered by a major palaeo-earthquake, comprises clastic dikes that cut through the Ries seismite-ejecta couplet. The clastic dikes were likely formed in response to the Steinheim impact, some kyr after the Ries impact, in line with paleontologic results. With the Ries and Steinheim impacts as two separate events, Southern Germany witnessed a double disaster in the Middle Miocene. The magnitude–distance relationship of seismite formation during large earthquakes suggests the seismic and destructive potential of impact-earthquakes may be signicantly underestimated. Introduction The ~24 km-diameter Nördlinger Ries1,2,3,4 and the ~4 km-diameter Steinheim Basin1,5,6,7,8 impact structures in southern Germany (Fig. -
GEOLOGY of the MOAB REGION Introduction
GEOLOGY OF THE MOAB REGION (Arches, Dead Horse Point and Canyonlands) Annabelle Foos Geology Department, University of Akron Introduction The geology of Arches National Park, porphyry laccolith that was intruded during the Dead Horse Point State Park and the “Island in Oligocene, 30 million years ago and the Sky” section of Canyonlands National Park experienced glaciation during the Pleistocene. is very similar. They occur in the Canyonlands Melting snow which accumulates in the section of the Colorado Plateau, in the vicinity mountains during winter months, replenishes of the confluence between the Green and streams and recharges bedrock aquifers Colorado Rivers. The same stratigraphic units providing a valuable source of fresh water to outcrop in all three parks (figure 1) plus salt this region. (Doelling and others, 1987) tectonic features can be found in both Arches and Canyonlands. While in the Moab region you will become familiar with some of the stratigraphic units we will see throughout the Colorado Plateau, observe salt tectonic features, arch formation and in the distance you can view the La Sal Mountains. Cryptogamic Soils While in these three parks (and throughout this trip) you will be required to STAY ON THE DESIGNATED TRAILS. This rule is especially important at these parks in order to preserve the fragile cryptogamic soils (figure 2). Cryptogamic soils are a complex of lichens, algae, moss and fungus that occurs as a black coating on the ground surface and as small mounds where it is well developed. It plays an extremely important role in the desert ecology. It binds the soil together and inhibits wind erosion and erosion by sheet wash. -
Angus Bulls, 13 Purebred Charolais Heifers, Weight 900 Pounds, Medium to Long Bred to Angus Bull, Home-Raised, Gentle
Lamb Prices Periodical postage paid. Priority handling requested. Called Steady To Lower ® San Angelo wool feeder lambs and all slaughter lambs were steady. Goldthwaite, Hamilton and Fredericksburg Livestock Weekly were $5-10 lower. Domestic lamb and mutton meat production for the week ending February 6 was esti- mated at 2.41 million pounds on a slaughter head count of VOL. 73 - NO. 6 SAN ANGELO, TEXAS THURSDAY, FEBRUARY 11, 2021 LIVESTOCKWEEKLY.COM $35 PER YEAR 36,000 as compared to 2.5 mil- lion pounds and 38,000 head the previous week. Imported lamb and mutton meat production for the week ending January 30 totaled 3016 metric tons, approximately 6.65 million pounds, or 265 percent of the domestic pro- duction for the same period. San Angelo wool feeder lambs weighing 41 pounds $310, 59 pounds $302, 74 pounds $268, slaughter lambs choice and prime 72-79 pounds $292-294, 110-127 pounds $146-164, few choice 85 pounds $228, 98 pounds $208, 103 pounds $200, 126 pounds $142. Hair lambs, choice and prime 40-49 pounds $300-310, 50-59 pounds $306-314, 60-69 pounds $288-312, 70-78 pounds $270-310, 84-89 pounds $254- 295, 90-95 pounds $226-250, 101-109 pounds $224-240, choice 42-48 pounds $298- PUNXSUTAWNEY PHIL’S forecast may have played a role Central Texas Sunday as freezing temperatures were expected to 300, few 53 pounds $296, 73 in ending pleasant winter afternoons like the one depicted in prevail across much of the country. pounds $264, 83 pounds $245, 90-97 pounds $192-210, 102- 107 pounds $190-214, 135-141 pounds $126-140.