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The sandstones of its lower member are also quite weathered and, thus, appear to have accumulated subaerially.
This is also subaerially exposed, but is flooded twice a month by spring tides.
However, if significant amounts of lava are later erupted subaerially, then the volcano may assume a more conventional shape.
Vesicular textures are up to 5%, suggesting that the lava erupted subaerially.
Except for the lowermost flows, which contain evidence of interaction with water, the entire sequence was erupted subaerially.
These are usually capped by a layer of alkalic volcanics deposited subaerially.
It is useful in dating ocean sediment cores and subaerially erupted volcanics.
At glaciovolcanic edifices, columnar-jointed flows may form subaerially or subglacially.
During the low-level phase of early Lake Ontario, the channel was abandoned and subaerially exposed.
It is subject to tidal shifts, which means that it is subaerially exposed once or twice a day.
This is the only place on the planet where such a triple junction in oceanic crust is exposed subaerially.
If the volcano breaches the surface of the glacier it will be topped by a subaerially erupted lava plateau.
This took place mainly in sediments of the marginal platforms which became subaerially exposed during low stands in sea-level.
Features, such as the presence of coal beds and desiccation cracks, suggest that parts of the unit were deposited subaerially.
The dredged samples show none of the features expected for submarine tholeiites and were therefore probably erupted subaerially and later subsided below present day sea-level.
Geo-spatial modelling shows subaerially exposed land that could have been inhabited by plants and animals, and also coastally migrating early North American peoples.
Pre-Holocene interglacial marine deposits subaerially exposed during glacial low sea-level stand(s) are desiccated to different degrees due to pedogenesis.
This means that the strata of the uppermost John Henry Member were subaerially exposed and eroded before Drip Tank deposition.
Eruptions occurred subglacially, subaqueously and/or subaerially as shown by a wide range in the degree of vesicularity, freshness and glass content of the lavas.
Geothermal modelling of the temperatures and permafrost observations indicates that the sites were subaerially exposed throughout most of the Wisconsinan, and during the early Holocene.
The flows are subaerially erupted plateau basalts and together with associated doleritic sills and dykes display many geochemical features typical of continental tholeiites.
Spatially discontinuous meltwater channel networks on the Canadian Prairies are usually interpreted as having formed subaerially in front of the retreating Laurentide ice sheet.
Both units were deposited subaerially, concurrent with folding and faulting, and share a contact that varies from gradational, near Kingsvale, to unconformable, near Spences Bridge.
Prior to lithification, the mud deposits had been frequently exposed subaerially and desiccated, as evidenced by the numerous mudcracks, while evaporites (mostly, gypsum) were deposited in isolated pools.
Basalt that erupts under open air (that is, subaerially) forms three distinct types of lava or volcanic deposits: scoria; ash or cinder (breccia); and lava flows.