scholarly journals Perseverance rover reveals an ancient delta-lake system and flood deposits at Jezero crater, Mars

Science ◽  
2021 ◽  
Author(s):  
N. Mangold ◽  
S. Gupta ◽  
O. Gasnault ◽  
G. Dromart ◽  
J. D. Tarnas ◽  
...  
Keyword(s):  
Lake System ◽  
Flood Deposits

AN ACID PERENNIAL SALINE LAKE SYSTEM FROM THE TRIASSIC MERCIA MUDSTONE GROUP IN THE CARNDUFF 02 CORE, NORTHERN IRELAND

2016 ◽  
Author(s):  
Anna Sofia Andeskie ◽  
◽  
Kathleen C. Benison ◽  
Lynnette A. Eichenlaub
Keyword(s):  
Northern Ireland ◽  
Saline Lake ◽  
Lake System

CONSTRUCTION OF A SPRING-LAKE SYSTEM IN THE JURASSIC NAVAJO SANDSTONE, UTAH—EVIDENCE FROM STABLE ISOTOPES OF OXYGEN AND CARBON

2017 ◽  
Author(s):  
Judith Totman Parrish ◽  
◽  
Ethan G. Hyland ◽  
Marjorie A. Chan ◽  
Stephen T. Hasiotis ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Navajo Sandstone ◽  
Lake System ◽  
Spring Lake

Detection of Extent of Sea Level Rise in a Coastal Lake System using IRS Satellite Imagery

2013 ◽  
Vol 27 (7) ◽  
pp. 2657-2670 ◽  
Author(s):  
A. M. Sheela ◽  
J. Letha ◽  
Joseph Sabu ◽  
K. K. Ramachandran ◽  
J. Justus
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Satellite Imagery ◽  
Coastal Lake ◽  
Lake System

Interaction between Solvatochromic Dyes and Water Sampled from a Natural Source Treated with High Dilutions of Phosphorus

Homeopathy ◽  
2020 ◽  
Vol 109 (03) ◽  
pp. 126-132
Author(s):  
Ana Carla C. Aparicio ◽  
Larissa Helen S. de Oliveira ◽  
Jefferson S. Silva ◽  
Cideli P. Coelho ◽  
Sonia Regina Pinheiro ◽  
...  
Keyword(s):  
Water Source ◽  
Chemical Monitoring ◽  
Lake System ◽  
Solvatochromic Dyes ◽  
Physico Chemical ◽  
Untreated Water ◽  
Before And After ◽  
High Dilutions ◽  
Methylene Violet ◽  
Solvatochromic Dye

Abstract Background Highly diluted and succussed solutions interact with solvatochromic dyes, indicating that changes in solvent and solute polarity could be related to their mechanism of action. It is not known, however, how the activity associated with succussed high dilutions is transferred to untreated water and what the limits of this process are. Aims The aims of the present study were to ascertain whether a succussed high dilution of phosphorus (1.5 × 1−59 M; Phos 30cH) seeded into a natural water source that fed a fjord and two connected lakes could propagate itself through the lake system (total volume 2200 m3) and, moreover, whether the process could be tracked using solvatochromic dyes. Methods Samples of water were collected before and after seeding, at different times and places throughout the lake system. Controls comprised water taken from an untreated and adjacent, but independent, lake (1385 m3). Results Water samples taken up to 72 hours after the source treatment produced significant increases (p ≤ 0.03) in the absorbance of the solvatochromic dye methylene violet (MV), while samples from the control lake produced no changes. Conclusions The study indicates that activity associated with Phos 30c can propagate itself through large volumes of water, causing changes throughout a whole connected lake system, and that these changes can be tracked using the solvatochromic dye MV. This in turn means the use of homeopathic medicines in large volumes of drinking water, in farming and ecological contexts, now has the potential to be assessed with physico-chemical monitoring.

Probabilistic framework for assessing ecological risk of Contaminants of Emerging Concern: Application to a canadian lake system

Chemosphere ◽  
2021 ◽  
pp. 131910
Author(s):  
Gyan Chhipi-Shrestha ◽  
Manuel Rodriguez ◽  
Sonja Behmel ◽  
Rama Pulicharla ◽  
Francois Proulx ◽  
...  
Keyword(s):  
Ecological Risk ◽  
Contaminants Of Emerging Concern ◽  
Probabilistic Framework ◽  
Lake System

Dynamics of a Kalahari long-lived mega-lake system: hydromorphological and limnological changes in the Makgadikgadi Basin (Botswana) during the terminal 50 ka

Hydrobiologia ◽  
2013 ◽  
Vol 739 (1) ◽  
pp. 25-53 ◽  
Author(s):  
Frank Riedel ◽  
Andrew C. G. Henderson ◽  
Karl-U. Heußner ◽  
Georg Kaufmann ◽  
Annette Kossler ◽  
...  
Keyword(s):  
Lake System

Middle Holocene environmental reconstruction and climatic inferences through multi-proxy records from Seymareh lake sediments (Zagros Mts., Iran)

2021 ◽  
Author(s):  
Michele Delchiaro ◽  
Giulia Iacobucci ◽  
Francesco Troiani ◽  
Marta Della Seta ◽  
Paolo Ballato ◽  
...  
Keyword(s):  
Sedimentation Rate ◽  
Water Discharge ◽  
Sediment Supply ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
The Holocene ◽  
Middle Holocene ◽  
Lake System ◽  
Proxy Records ◽  
The Impact

<p>The Seymareh landslide is the largest rock slope failure (44 Gm<sup>3</sup>) ever recorded on the exposed Earth surface. It detached ∼10 ka BP from the northeastern flank of the Kabir-Kuh anticline (Zagros Mts., Iran) originating the natural dam responsible for the formation of a three-lake system (Seymareh, Jaidar, and Balmak lakes, with an area of 259, 46, and 5 km<sup>2</sup>, respectively). The lake system persisted for ∼3000 yr during the Holocene before its emptying phase due to overflow. A sedimentation rate of 21 mm yr<sup>−1</sup> was estimated for the Seymareh lacustrine deposits, which increased during the early stage of lake emptying because of enhanced sediment yield from the lake tributaries. </p><p>To reconstruct the climatic and environmental impact on the lake infilling, we reviewed the geomorphology of the basins and combined the results with multi-proxy records from a 30 m thick lacustrine sequence in Seymareh Lake. Major analyses comprise grain size analysis, carbon and oxygen stable isotopes of carbonate-bearing sediments, and X-ray diffraction analysis of clay minerals.</p><p>Lake overflowing is largely accepted as the main response to variations in water discharge and sediment supply since the alternation from dry to wet phases enhances sediment mobilization along hillslopes decreasing the accommodation space in the downstream sedimentary basins. In this regard, during the early-middle Holocene, the Seymareh area, as well as the entire Middle East, was affected by short-term climate changes at the millennial-scale, as testified by both paleoecological and archaeological evidence. Indeed, several records from Iranian lakes (i.e., Mirabad, Zeribar, Urmia) well documented the temperature and the moisture conditions of the western Zagros Mountains during the Holocene. During the early Holocene, the precipitation remained low up to 6 ka BP, reaching the driest condition around 8-8.2 ka BP. The impact of this abrupt climate change is evident across West Asia, where the first large villages with domesticated cereals and sheeps disappeared, converting to small hamlets and starting habitat-tracking. As regards the Seymareh area, a more irregular distribution of rainfalls and their increasing seasonality may support rhexistasy conditions, during which the scarce vegetation cover enhances both the hillslope erosion and sedimentation rate in the basins, most likely contributing to the overflow of Seymareh Lake. </p>

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