Itinerary Changes 2021
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Detrital Zircon Geochronology of Palaeozoic Siliciclastic Rocks from the Ellsworth Mountains, West Antarctica
O EOL GIC G A D D A E D C E I H C I L E O S F u n 2 d 6 la serena octubre 2015 ada en 19 Detrital zircon geochronology of Palaeozoic siliciclastic rocks from the Ellsworth Mountains, West Antarctica Paula Castillo* and C. Mark Fanning Research School of Earth Sciences, The Australian National University, Canberra, Australia. Rodrigo Fernández University of Texas Institute for Geophysics, The University of Texas at Austin, Austin, Texas, USA. Fernando Poblete Geosciences Rennes, Université de Rennes 1, Rennes, France. Departamento de Geología, Universidad de Chile, Santiago, Chile. *Contact email: [email protected] Abstract. In the Ellsworth Mountains there is an extensive record of sedimentation from early Cambrian to Permian times. However, the tectonic history and the palaeogeographic significance remain enigmatic. Nine sandstone samples were analysed for their U-Pb detrital zircon age spectra using SHRIMPII and RG. They belong to the early Cambrian to Carboniferous-Permian sequences and record typical Gondwana margin signatures. Variations up section/sequence in zircon provenance suggest restricted basinal deposition during the Cambrian,! with likely sources in the Namaqua-Natal and Mozambique/Maud Belts. There are little or no contributions from older cratons and so the Ellsworth basin evolved as a separate basin to that in the Transantarctic Mountains.! This basin configuration changed after the Devonian and deposition continued Figure 1. Reconstruction of part of Gondwana at ca. 500 Ma. during the late Palaeozoic, when the Ellsworth Mountains South America: SFC - Sao Francisco craton; PPC - basin only received detritus from the Ross/Pan-African Paranapanema craton; RPC - Río de la Plata craton. -
Review of the Geology and Paleontology of the Ellsworth Mountains, Antarctica
U.S. Geological Survey and The National Academies; USGS OF-2007-1047, Short Research Paper 107; doi:10.3133/of2007-1047.srp107 Review of the geology and paleontology of the Ellsworth Mountains, Antarctica G.F. Webers¹ and J.F. Splettstoesser² ¹Department of Geology, Macalester College, St. Paul, MN 55108, USA ([email protected]) ²P.O. Box 515, Waconia, MN 55387, USA ([email protected]) Abstract The geology of the Ellsworth Mountains has become known in detail only within the past 40-45 years, and the wealth of paleontologic information within the past 25 years. The mountains are an anomaly, structurally speaking, occurring at right angles to the Transantarctic Mountains, implying a crustal plate rotation to reach the present location. Paleontologic affinities with other parts of Gondwanaland are evident, with nearly 150 fossil species ranging in age from Early Cambrian to Permian, with the majority from the Heritage Range. Trilobites and mollusks comprise most of the fauna discovered and identified, including many new genera and species. A Glossopteris flora of Permian age provides a comparison with other Gondwana floras of similar age. The quartzitic rocks that form much of the Sentinel Range have been sculpted by glacial erosion into spectacular alpine topography, resulting in eight of the highest peaks in Antarctica. Citation: Webers, G.F., and J.F. Splettstoesser (2007), Review of the geology and paleontology of the Ellsworth Mountains, Antarctica, in Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES, edited by A.K. Cooper and C.R. Raymond et al., USGS Open- File Report 2007-1047, Short Research Paper 107, 5 p.; doi:10.3133/of2007-1047.srp107 Introduction The Ellsworth Mountains are located in West Antarctica (Figure 1) with dimensions of approximately 350 km long and 80 km wide. -
Itinerary Changes 2021
ITINERARY CHANGES 2021 Due to the ongoing COVID-19 pandemic ALE has made some adjustments to our operations in order to ensure the well-being of our guests and staff and to minimize the risk of bringing the infection into Antarctica. Below, you will find how our itineraries across all of our experiences for the 2021-22 season will be modified. Punta Arenas • You will be required to arrive in Punta Arenas 4 nights prior to your departure. • Welcome and Safety Briefings will be done virtually. • There will be no fitting periods for Rental Clothing in the Punta Arenas office, instead clothing will be picked up at a specified location and time. Further information will be given upon arrival in Punta Arenas. • Your Gear Checks will be done virtually and we will explain to you how this will be done once you arrive in Punta Arenas. • Flight Check in and Baggage Drop Off will be done using COVID-19 safe practices and you will receive more information on how this will be done on arrival in Punta Arenas. • You will be required to complete and sign a COVID-19 Declaration prior to your departure. Antarctica ALE has developed COVID-19 management procedures for Antarctica. These will be covered in your briefings in Punta Arenas and on arrival at Union Glacier. Please visit our FAQ for more detailed information on ALE’s COVID-19 Management Strategy https:// bit.ly/3g5e4ql EMPERORS & EXPLORERS Experience two Antarctic icons in one action- WALK WITH packed adventure. Fly by ski aircraft to the Gould Bay Emperor Penguin Colony on the remote coast EMPERORS of the Weddell Sea. -
Antarctic Primer
Antarctic Primer By Nigel Sitwell, Tom Ritchie & Gary Miller By Nigel Sitwell, Tom Ritchie & Gary Miller Designed by: Olivia Young, Aurora Expeditions October 2018 Cover image © I.Tortosa Morgan Suite 12, Level 2 35 Buckingham Street Surry Hills, Sydney NSW 2010, Australia To anyone who goes to the Antarctic, there is a tremendous appeal, an unparalleled combination of grandeur, beauty, vastness, loneliness, and malevolence —all of which sound terribly melodramatic — but which truly convey the actual feeling of Antarctica. Where else in the world are all of these descriptions really true? —Captain T.L.M. Sunter, ‘The Antarctic Century Newsletter ANTARCTIC PRIMER 2018 | 3 CONTENTS I. CONSERVING ANTARCTICA Guidance for Visitors to the Antarctic Antarctica’s Historic Heritage South Georgia Biosecurity II. THE PHYSICAL ENVIRONMENT Antarctica The Southern Ocean The Continent Climate Atmospheric Phenomena The Ozone Hole Climate Change Sea Ice The Antarctic Ice Cap Icebergs A Short Glossary of Ice Terms III. THE BIOLOGICAL ENVIRONMENT Life in Antarctica Adapting to the Cold The Kingdom of Krill IV. THE WILDLIFE Antarctic Squids Antarctic Fishes Antarctic Birds Antarctic Seals Antarctic Whales 4 AURORA EXPEDITIONS | Pioneering expedition travel to the heart of nature. CONTENTS V. EXPLORERS AND SCIENTISTS The Exploration of Antarctica The Antarctic Treaty VI. PLACES YOU MAY VISIT South Shetland Islands Antarctic Peninsula Weddell Sea South Orkney Islands South Georgia The Falkland Islands South Sandwich Islands The Historic Ross Sea Sector Commonwealth Bay VII. FURTHER READING VIII. WILDLIFE CHECKLISTS ANTARCTIC PRIMER 2018 | 5 Adélie penguins in the Antarctic Peninsula I. CONSERVING ANTARCTICA Antarctica is the largest wilderness area on earth, a place that must be preserved in its present, virtually pristine state. -
Download Factsheet
Antarctic Factsheet Geographical Statistics May 2005 AREA % of total Antarctica - including ice shelves and islands 13,829,430km2 100.00% (Around 58 times the size of the UK, or 1.4 times the size of the USA) Antarctica - excluding ice shelves and islands 12,272,800km2 88.74% Area ice free 44,890km2 0.32% Ross Ice Shelf 510,680km2 3.69% Ronne-Filchner Ice Shelf 439,920km2 3.18% LENGTH Antarctic Peninsula 1,339km Transantarctic Mountains 3,300km Coastline* TOTAL 45,317km 100.00% * Note: coastlines are fractal in nature, so any Ice shelves 18,877km 42.00% measurement of them is dependant upon the scale at which the data is collected. Coastline Rock 5,468km 12.00% lengths here are calculated from the most Ice coastline 20,972km 46.00% detailed information available. HEIGHT Mean height of Antarctica - including ice shelves 1,958m Mean height of Antarctica - excluding ice shelves 2,194m Modal height excluding ice shelves 3,090m Highest Mountains 1. Mt Vinson (Ellsworth Mts.) 4,892m 2. Mt Tyree (Ellsworth Mts.) 4,852m 3. Mt Shinn (Ellsworth Mts.) 4,661m 4. Mt Craddock (Ellsworth Mts.) 4,650m 5. Mt Gardner (Ellsworth Mts.) 4,587m 6. Mt Kirkpatrick (Queen Alexandra Range) 4,528m 7. Mt Elizabeth (Queen Alexandra Range) 4,480m 8. Mt Epperly (Ellsworth Mts) 4,359m 9. Mt Markham (Queen Elizabeth Range) 4,350m 10. Mt Bell (Queen Alexandra Range) 4,303m (In many case these heights are based on survey of variable accuracy) Nunatak on the Antarctic Peninsula 1/4 www.antarctica.ac.uk Antarctic Factsheet Geographical Statistics May 2005 Other Notable Mountains 1. -
Geology and Paleontology of the Ellsworth Mountains, Antarctica
should contact a Board member through the American Proposal forms, information for contributors, and catalogs of Geophysical Union to determine whether a volume in a specific books in print are available from the American Geophysical field is in process and whether the work is appropriate for Union, 2000 Florida Avenue, N.W., Washington, D.C. 20009. inclusion. The telephone number is (202) 462-6903. The bibliography is stored on a word processor disk at the Geology and paleontology of the Minnesota Geological Survey. A copy is available from the au- Ellsworth Mountains thors on request. The contents list of chapters is given below. Geology and Paleontology of the Ellsworth Mountains, Antarctica. G.F. Webers, C. Craddock, and J.F. Splettstoesser, Editors. Geological Society of America Memoir, no. 170. G.E. WEBERS • Webers, G. E, C. Craddock, and J.E Splettstoesser. History of exploration and geologic history of the Ellsworth Mountains. Macalester College • Webers, G.F., R.L. Bauer, J.M. Anderson, W. Buggisch, R.W. St. Paul, Minnesota 55105 Ojakangas, and K.B. Sporli. Geology of the Heritage Group of the Ellsworth Mountains. J.F. SPLETTSTOESSER • Sporli, K.B. The crashsite Group of the Ellsworth Mountains, West Antarctica. • Matsch, C.L., and R.W. Ojakangas. Stratigraphy and sedi- Minnesota Geological Survey mentology of the Whiteout Conglomerate—A late Paleozoic University of Minnesota St. Paul, Minnesota 55114 glacigenic sequence in the Ellsworth Mountains, West Antarctica. • Collinson, J.W., C.L. Vavra, and J.M. Zawiskie. Sedimen- tology of the Polarstar Formation, Permian, Ellsworth Moun- Coordination continued in 1987 on the production of a vol- tains, Antarctica. -
Itinerary Changes 2021
ITINERARY CHANGES 2021 Due to the ongoing COVID-19 pandemic ALE has made some adjustments to our operations in order to ensure the well-being of our guests and staff and to minimize the risk of bringing the infection into Antarctica. Below, you will find how our itineraries across all of our experiences for the 2021-22 season will be modified. Punta Arenas • You will be required to arrive in Punta Arenas 4 nights prior to your departure. • Welcome and Safety Briefings will be done virtually. • There will be no fitting periods for Rental Clothing in the Punta Arenas office, instead clothing will be picked up at a specified location and time. Further information will be given upon arrival in Punta Arenas. • Your Gear Checks will be done virtually and we will explain to you how this will be done once you arrive in Punta Arenas. • Flight Check in and Baggage Drop Off will be done using COVID-19 safe practices and you will receive more information on how this will be done on arrival in Punta Arenas. • You will be required to complete and sign a COVID-19 Declaration prior to your departure. Antarctica ALE has developed COVID-19 management procedures for Antarctica. These will be covered in your briefings in Punta Arenas and on arrival at Union Glacier. Please visit our FAQ for more detailed information on ALE’s COVID-19 Management Strategy https:// bit.ly/3g5e4ql SOUTH POLE FLIGHTS THESOUTHERNMOSTPOINT ONEARTH Fly to the South Pole, where all 360 lines of longi- tude meet and in a few steps you can walk around the world. -