Wind Trends Research Articles

Early Mesozoic Wind Patterns as Suggested by Dune Bedding in the Botucatú Sandstone of Brazil and Uruguay

Research Article| July 01, 1961 Early Mesozoic Wind Patterns as Suggested by Dune Bedding in the Botucatú Sandstone of Brazil and Uruguay JOÃO JOSÉ BIGARELLA; JOÃO JOSÉ BIGARELLA Instituto de Geologia, Universidade do Paraná, Caixa Postal 756, Curitiba,Paraná, Brazil Search for other works by this author on: GSW Google Scholar RIAD SALAMUNI RIAD SALAMUNI Instituto de Geologia, Universidade do Paraná, Caixa Postal 756, Curitiba,Paraná, Brazil Search for other works by this author on: GSW Google Scholar Author and Article Information JOÃO JOSÉ BIGARELLA Instituto de Geologia, Universidade do Paraná, Caixa Postal 756, Curitiba,Paraná, Brazil RIAD SALAMUNI Instituto de Geologia, Universidade do Paraná, Caixa Postal 756, Curitiba,Paraná, Brazil Publisher: Geological Society of America Received: 08 Oct 1959 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1961, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1961) 72 (7): 1089–1105. https://doi.org/10.1130/0016-7606(1961)72[1089:EMWPAS]2.0.CO;2 Article history Received: 08 Oct 1959 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation JOÃO JOSÉ BIGARELLA, RIAD SALAMUNI; Early Mesozoic Wind Patterns as Suggested by Dune Bedding in the Botucatú Sandstone of Brazil and Uruguay. GSA Bulletin 1961;; 72 (7): 1089–1105. doi: https://doi.org/10.1130/0016-7606(1961)72[1089:EMWPAS]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract At 51 outcrops of the eolian Botucatú sandstone (Early Mesozoic) in Brazil and Uruguay the writers made 2892 measurements. A new instrument for making these measurements has been designed and constructed and is thought to provide accurate data more rapidly than present methods.Two wind trends have been detected in the Botucatú sandstone. The southern outcrops indicate deposition by winds which blew mainly from the west or west-southwest; the northern outcrops indicate deposition by a prevailing wind blowing from the north or north-northeast.Orientation of cross-bedding in the Botucatú sandstone suggests that most of this sand was deposited in the trade-wind belt, on the assumption that the wind belts have been a general feature throughout geological time. In some respects, the position of present-day high- and low-pressure areas in South America and vicinity are believed comparable to those existing in Triassic time. Early Mesozoic wind patterns and pressure belts, as determined from eolian cross-bedding dip directions, are in agreement with the paleomagnetic results reported by Creer. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

STRATOSPHERE WINDS AND TEMPERATURES IN LOW LATITUDES FROM ACOUSTICAL PROPAGATION STUDIES

The results of six determinations of winds and temperatures in the 30–60-km level from acoustical studies are presented. The areas studied are: Canal Zone, January 1950; Hawaii, August 1950; Florida, October 1950; Canal Zone, November 1950; Bermuda, December 1950; and Florida, January 1951. The results establish more firmly the average seasonal and latitudinal trends of the high-altitude winds and temperatures reported earlier. The main features observed are the light winds in low-latitude continental areas during the winter, and the low temperatures and high winds over oceanic areas. A brief study of the errors involved in the determination of high-altitude winds and temperatures by acoustical methods is also presented.