In medieval days the river was navigable from Portarlington to its debouchment at St Mullins.
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He relied on 15 Panzer Division and the Reconnaissance Group around Azizia to break up any debouchment from the escarpment by British forces.
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The valley of the Tay, from the source of that river in the west to its debouchment at Dundee, is peculiarly rich in historic memoirs.
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The Wadjiginy territory was around Anson Bay, from the debouchment of the Daly River northwards as far as Point Blaze, and was estimated by Norman Tindale to range over roughly . Their inland extension is estimated at around 20 miles from the coast.
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In this sense the district extends, so far as research has been made, from Jubilee Point on the north shore of Rice Lake, and at the debouchment of the Otonabee River on the west, to the mouth of the Trent River on the east.
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The Tingjiang is unique among Fujianese rivers in that its lower watershed and debouchment are outside the province. The traffic in Tingzhou-fu/Changting then (before road and rail came very recently) was always primarily with eastern areas of Guangdong, namely Meizhou and, further down, the Min-Nan-speaking Chao-Shan area -- Chaozhou (潮州) and Shantou (汕头).
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Some authors have noted a series of large, km-wide fractured plates that appear southwest of the debouchment of the Athabasca Valles into the Cerberus Palus plains region. Some authors have interpreted these features as analogous to lava rafts expelled downstream from the Athabasca Valles system during its formation. Such rafts have been observed in the pahoehoe lavas of Hawaii which have stagnated, forming a surface that hardens and then cracks. Gas escapes from lava around the peripheries of the resulting polygons, collapsing their edges and causing the centers of the polygons to bulge.
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A silver stater of the pre-Roman Durotriges tribe has been found in Teffont which may have been near the boundary of Durotrigian territory. The modern name derives from "Teo", an old Germanic word meaning a boundary, and the Late Latin word "fontana", meaning a spring of water. The perennial stream rises at Spring Head at the north end of Teffont Magna, and flows some 2.5 km south to its debouchment into the River Nadder. Enamelled Roman trumpet brooch, Upper Holt, Teffont EviasEarly Saxon remains have not been found to the west of the stream, and the original boundary may have separated the Romano-British from the Anglo-Saxons.
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These sulfate signatures are only observed on the upper unit identified by Sowe and her coworkers. In 2011, Mariam Sowe, Gerhard Neukum (Free University of Berlin) and Ralf Jaumann (DLR) published a comparative study of interior layered deposits across Valles Marineris and the region of its debouchment into Chryse Planitia. Ganges Mensa was one of two principal sites (along with Eos Chasma) where these ILDs had been observed and studied in the Valles Marineris network, with the remainder of the studied sites downstream to the northeast. A cross-section of a region including Ganges Mensa and Eos Chasma was prepared in the publication, and the particular formation mechanisms of the ILDs discussed therein.
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She was not able to identify the precise mechanism by which floodwaters might catastrophically emerge from Cerberus Fossae but strongly favored floodwaters as the mechanism by which all three channels formed. In 2003, Stephanie C. Werner and Gerhard Neukum of the Free University of Berlin and Stephan van Gasselt of the German Aerospace Center (DLR) re-affirmed the earlier crater-age dates asserted in 2001 by Berman and Hartmann using MGS data (MOC and MOLA). The researchers asserted that the valley is older than previously believed, noting the presence of flood deposits past the Athabasca Valles' debouchment dating back to as early as 1.6 Ga. The authors interpreted the valley system as having experienced geologic activity for a very long period of time, with volcanic activity (most recently up to 3 Ma) dominant towards the most recent history of the valley system. The authors favored the choice of the Athabasca Valles as a chosen landing site for the Mars Exploration Rover mission (better-known to the public as Spirit and Opportunity).
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In total, the areal extent of the debouched lava flows that formed the Athabasca Valles system have been mapped as covering a region reaching completely across Elysium Planitia to the south, indistinctly disappearing into the northern margin of Zephyria Planum and stretching across a wide swath of Cerberus Palus in the east-west sense, canvassing a region nearly as wide as the Elysium Rise. This flood lava unit is as large as Oregon and is of a greater areal extent than the largest of the large igneous provinces on Earth - the Deccan and Rajamundry Traps of southern India. A knobby terrain lies to the northwest of the debouchment of the Athabasca Valles and has been dated by crater counting to be the oldest extant geologic unit in the Athabasca Valles system, and is Noachian in age. Modern extensional near-source faulting associated with southern Cerberus Fossae has been found to postdate the formation of all features in the valley, and are likely the most geologically recent features of the Athabasca Valles system.
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