Palaeogeography around the Harappan port of Lothal, Gujarat, western India

Antiquity ◽  
2004 ◽  
Vol 78 (302) ◽  
pp. 896-903 ◽  
Author(s):  
A.S. Khadkikar ◽  
C. Rajshekhar ◽  
K.P.N. Kumaran
Keyword(s):  
Salt Marsh ◽  
Sea Level ◽  
Satellite Imagery ◽  
Environmental Analysis ◽  
Western India ◽  
Tidal Salt Marsh ◽  
Multispectral Satellite Imagery ◽  
Indus Civilisation

The authors report a reconstruction of the palaeogeography around the Harappan town of Lothal, major port of the Indus civilisation, using multispectral satellite imagery and environmental analysis. Key results include the identification of a broad tidally influenced palaeochannel adjoining the western part of Lothal and a former estuary towards the east. Micropalaeontological analyses show that Lothal developed over a tidal salt marsh and was subsequently left high and dry as the sea level dropped.

A foraminiferal proxy record of 20th century sea-level rise in the Manukau Harbour, New Zealand

2012 ◽  
Vol 63 (4) ◽  
pp. 370 ◽  
Author(s):  
Hugh R. Grenfell ◽  
Bruce W. Hayward ◽  
Ritsuo Nomura ◽  
Ashwaq T. Sabaa
Keyword(s):  
New Zealand ◽  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
20Th Century ◽  
Tide Gauge ◽  
Sediment Accumulation ◽  
Proxy Record ◽  
Tide Gauge Record ◽  
Tidal Salt Marsh

The present study aimed to extract a sea-level history from northern New Zealand salt-marsh sediments using a foraminiferal proxy, and to extend beyond the longest nearby tide-gauge record. Transects through high-tidal salt marsh at Puhinui, Manukau Harbour, Auckland, New Zealand, indicate a zonation of dominant foraminifera in the following order (with increasing elevation): Ammonia spp.–Elphidium excavatum, Ammotium fragile, Miliammina fusca, Haplophragmoides wilberti–Trochammina inflata, Trochamminita salsa–Miliammina obliqua. The transect sample faunas are used as a training set to generate a transfer function for estimating past tidal elevations in two short cores nearby. Heavy metal, 210Pb and 137Cs isotope analyses provide age models that indicate 35 cm of sediment accumulation since ~1890 AD. The first proxy-based 20th century rates of sea-level rise from New Zealand’s North Island at 0.28 ± 0.05 cm year–1 and 0.33 ± 0.07 cm year–1 are estimated. These are faster than the nearby Auckland tide gauge for the same interval (0.17 ± 0.1 cm year–1), but comparable to a similar proxy record from southern New Zealand (0.28 ± 0.05 cm year–1) and to satellite-based observations of global sea-level rise since 1993 (0.31 ± 0.07 cm year–1).

Mapping properties of vegetation in a tidal salt marsh from multi-spectral satellite imagery using the SCOPE model

2020 ◽  
Vol 42 (2) ◽  
pp. 422-444
Author(s):  
Lei Meng ◽  
Ying Huang ◽  
Nanhuanuowa Zhu ◽  
Zihan Chen ◽  
Xiuzhen Li
Keyword(s):  
Salt Marsh ◽  
Satellite Imagery ◽  
Tidal Salt Marsh ◽  
Scope Model

scholarly journals Importance of Biogeomorphic and Spatial Properties in Assessing a Tidal Salt Marsh Vulnerability to Sea-level Rise

2013 ◽  
Vol 37 (4) ◽  
pp. 941-951 ◽  
Author(s):  
Karen M. Thorne ◽  
Deborah L. Elliott-Fisk ◽  
Glenn D. Wylie ◽  
William M. Perry ◽  
John Y. Takekawa
Keyword(s):  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
Tidal Salt Marsh ◽  
Spatial Properties

Distribution of Salt-marsh foraminifera in Jiaozhou Bay: Implications for sea-level reconstructions

2020 ◽  
Author(s):  
Haiyan Long ◽  
Ziye Li
Keyword(s):  
Salt Marsh ◽  
Sea Level ◽  
Environmental Changes ◽  
Jiaozhou Bay ◽  
The Yellow Sea ◽  
Western Margin ◽  
Latitude Range ◽  
Tidal Salt Marsh ◽  
Key Indicators ◽  
Salt Marsh Species

<p>Salt-marsh foraminifera are routinely used as sea-level indicators since their vertical distribution is closely linked with elevation relative to the tidal frame. In this study, 106 surface sediment samples were collected across separate intertidal transects established at five micro-tidal salt-marsh situated along the coasts of the Jiaozhou Bay, western margin of the Yellow Sea, dead and live foraminifera were identified respectively. The dead population contains the mixture of both subtidal species and salt-marsh species, and all the live assemblages consist of salt-marsh species which can provide exact information of salt-marsh foraminiferal distribution. The agglutinated species present in the five marshes including <em>Trochammina inflata</em>, <em>Miliammina fusca</em> and <em>Jadammina macrecens</em> are all cosmopolitan species, however, the calcareous species contain numbers of endemic species, overall, dominant calcareous species included <em>Cribrononion porisuturalis</em>, <em>Pseudononionella variabilis</em>, <em>Elphidiella kiangsuensis</em> and <em>Pseudogyroidina sinensis</em>. Vertical foraminifera zonations have been recognized in Daguhe and Hongshiya marsh samples with some species occupying strict latitude range, which primarily related to elevation, however, no obvious assemblages zonations can be recognized in Nvgukou, Shanjiaodi and Yanghe marsh. We hypothesize that salt-marsh foraminifera in Jiaozhou Bay possesses potential in paleoenvironmental studies as the key indicators for monitoring Holocene sea-level and environmental changes.</p>

scholarly journals Beyond 2100: Elevation capital disguises salt marsh vulnerability to sea-level rise in Georgia, USA

2020 ◽  
pp. 107093
Author(s):  
Amy K. Langston ◽  
Clark R. Alexander ◽  
Merryl Alber ◽  
Matthew L. Kirwan
Keyword(s):  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
Elevation Capital
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