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  Subjects -> GEOGRAPHY (Total: 493 journals)
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Journal of Geography and Geology
Number of Followers: 12  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1916-9779 - ISSN (Online) 1916-9787
Published by CCSE Homepage  [43 journals]
  • Reviewer Acknowledgements for Journal of Geography and Geology, Vol. 14,
           No. 2

    • Abstract: Reviewer Acknowledgements for Journal of Geography and Geology, Vol. 14, No. 2
      PubDate: Tue, 29 Nov 2022 06:03:02 +000
       
  • Evidence of An Ice-Dammed Lake and Laurentide Readvance Upper Susquehanna
           Valley, New York State

    • Abstract: Landforms and well logs document a system of ice-contact and proglacial lakes in the upper Susquehanna valley during Laurentide Ice Sheet retreat from the Appalachian Plateau, central New York State.  Recessional moraines formed dams for all lakes, except a newly revealed “Ancestral Goodyear Lake” retained behind an ephemeral ice dam stranded at Colliersville.  A prominent dead-ice sink currently occupies the valley floor at the dam siteAncestral Goodyear Lake held a stable lake level at 1360 feet as represented by thick lake sediments perched in water well logs on the valley wall above Goodyear Lake.  A deltaic terrace at 1250 feet in the same vicinity marks a second, lower lake strand.   In addition, water well logs on the adjacent Portlandville Moraine contain lake sediments bound above and below by ice-contact material deposits thus demonstrating a Laurentide readvance that subsequently dammed the valley to form Glacial Lake Milford as part of the Susquehanna Lake System.
      PubDate: Thu, 03 Nov 2022 05:19:00 +000
       
  • How a New Glacial History Paradigm Explains Northeast Alabama’s
           Tennessee River-Gulf of Mexico Drainage Divide Area Topographic Map
           Drainage System Evidence

    • Abstract: A new and fundamentally different glacial history paradigm (developed by using Missouri River drainage basin topographic map evidence) is tested by using topographic map drainage system and erosional landform evidence located along and near the northeast Alabama Tennessee River-Gulf of Mexico drainage divide (Tennessee Valley Divide). The new paradigm describes a thick North American continental ice sheet (located where continental ice sheets are usually reported to have been) which was erosive and heavy enough to create and occupy a deep “hole” and which produced massive meltwater floods which first flowed across the deep “hole’s” rising southern rim and which were subsequently forced by deep “hole” rim uplift to flow inside the deep “hole” rim and finally to flow northward into the deep “hole” itself. Northeast Alabama topographic map evidence including divide crossings (low points along drainage divides), barbed tributaries, and other unusual drainage features verify new paradigm predictions that large and prolonged south-oriented floods first flowed across the northeast Alabama Tennessee Valley Divide (which was a segment of the new paradigm’s deep “hole” southern rim) and were subsequently diverted along the rising deep “hole” rim and finally reversed to reach the Mississippi River valley (which became the deep “hole’s” only remaining southern exit) and to form what is today the southwest-, northwest-, and north-oriented Tennessee River.
      PubDate: Wed, 02 Nov 2022 01:32:44 +000
       
  • COVID-19 in Ethiopia: A Regional Geographical Analysis and Examination of
           Complex Interactions between a Pandemic, Geopolitics, Domestic War,
           Drought, and Poverty

    • Abstract: COVID-19 arrived in Ethiopia - a least developed country – amidst internal instabilities including a civil war, drought, and a contentious national election, all taking place concurrently with international pressures linked to disagreements with Egypt and Sudan over the construction of the Great Ethiopian Renaissance Dam (GERD) along the Ethio-Sudanese border. External challenges also came in the form of US and European Union’s pressures on Ethiopia, a close trading partner of China, over perceived threats posed by growing influences of Russia and China in the Horn of Africa and Red Sea regions. External pressures emboldened internal grumblings resulting in an all-out domestic war. Not much is known about the combined or isolated impacts of these events on Ethiopia’s COVID-19 response and on the spread of the disease. To fill this knowledge gap, a descriptive analysis is conducted for the July 27, 2020 through May 9th, 2022 period using data obtained from the Ministry of Health websites. In a possible sign of the impacts of the stated influences, the capital city Addis Ababa, home to just four percent of the country’s estimated population of 120 million, accounted for roughly two-thirds of the 470,760 COVID-19 cases, and of the 7,510 deaths, as testing and death reporting outside of the capital was constrained by security concerns. A peak daily count of 5,185 cases and a case-positivity ratio of 39 percent were reached on December 28, 2021. It is uncertain to what extent the low national and regional counts of cases and deaths are the results of prevention or demographic invulnerability as opposed to limited testing and underreporting of cases and deaths outside of Addis Ababa.  Ethiopia needs to put in place rigorous systems of data generation through testing, as well as pipelines for its dissemination, both in normal times and during unforeseen exigencies.
      PubDate: Mon, 27 Jun 2022 02:30:19 +000
       
  • Recent Transport and Deposition of Littoral Sand Across the Inner-Shelf of
           Central Oregon: Further Constraints on Estimating Depths of Closure
           (30–34 m) during Future Sea Level Rise in the Pacific Northwest Region,
           USA

    • Abstract: In this article, geologically recent sedimentation rates across a high wave- and wind-energy inner-shelf are used to constrain depths of closure, which are needed to estimate potential offshore displacements of littoral (beach) sand that could result from future sea level rise (SLR). Seven shallow vibracores (1.0–2.3 m subsurface depth) were analyzed from a single transect across the inner-shelf (19–72 m water depth) at the South PacWave study site in the high-wave energy (peak wave Hs= 10–15 m) coast of Central Oregon. The vibracores were 14C dated to establish 1) near-modern mixing depths and 2) net sedimentation rates that equaled or exceeded rates of coeval SLR (10 cm century-1) during very latest-Holocene time (≤1.0 ka). Sedimentation rates of 17 cm century-1 and 31 cm century-1 for vibracore P1-2A22 in 34 m water depth do exceed coeval SLR, even after accounting for apparent mixing depths of 60–100 cm. But sedimentation rates in deeper core sites (47–53 m water depth) do not approach coeval SLR rates. These results support a proposed near future (one century) 30 m depth of closure in the innermost-shelf of northern Oregon. Vibracore sand grain sizes (mean 0.20±0.03 mm 1σ, n=18) are similar across the inner-shelf, but heavy-mineral sand tracers confirmed that the latest-Holocene inner-shelf sand accumulations were supplied from seaward transport of littoral sand. The net loss of littoral sand to the inner-shelf sand sink accounts for the narrowing and thinning of beach deposits in northern Oregon during latest-Holocene time. A 1.0 m thickness of littoral sand displaced across the innermost-shelf (5–30 m water depth) following a 1.0 m SLR, or equivalent increase in offshore accommodation space, would yield a cross-sectional area of 1.5x103 m2. That value is three times larger than the mean cross-sectional area of the modern adjacent beaches (mean 4.8x102 m2) in the South PacWave study area. Following a possible near future SLR of 1.0 m, the popular sandy beaches of northern Oregon could be converted to intertidal gravel/algae covered bedrock platforms.
      PubDate: Tue, 07 Jun 2022 01:49:24 +000
       
 
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