Alluvial Fan Formation Near Aklavik, Northwest Territories, Canada
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چکیده
منابع مشابه
‘Drunken forest’ and near-surface ground ice in Mackenzie Delta, Northwest Territories, Canada
In Mackenzie River delta, emergent point bars are colonized by straight white spruce trees in association with alder and willow bushes. On older surfaces, colonized by mosses, the trees are characteristically leaning. In white spruce communities above the level of regular flooding, the trees are stunted and tilted. Tree lean and ground ice content were measured at 18 sites in the delta. There i...
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Pathogens can cause serious declines in host species, and knowing where pathogens associated with host declines occur facilitates understanding host-pathogen ecology. Suspected drivers of global amphibian declines include infectious diseases, with 2 pathogens in particular, Batrachochytrium dendrobatidis (Bd) and ranaviruses, causing concern. We explored the host range and geographic distributi...
متن کاملNew olenelloid trilobites from the Northwest Territories, Canada.
The Olenelloidea are a superfamily of early Cambrian trilobites, which have been the subject of several phylogenetic analyses and also used to address macroevolutionary questions regarding the nature and timing of the Cambrian radiation. The Sekwi Formation of the Mackenzie Mountains, Northwest Territories, Canada, has yielded numerous species from this clade, and here we present new informatio...
متن کاملEarly Proterozoic ( 1 . 9 Ga ) Thrombolites of the Rocknest Formation , Northwest Territories , Canada
Thrombolitic fabrics of the Rocknest Formation, Northwest Territories, Canada (Hoffman, 1975; Grotzinger and Hoffman, 1983; Grotzinger, 1986a, 1989b) were disputed by Kennard and James (1986) and Kennard (1989) and classified as cryptomicrobial boundstones. Under close re-examination, these rocks reveal mesoscopic and microscopic fabrics which are indeed thrombolitic when considered in the cont...
متن کاملLate alluvial fan formation in southern Margaritifer Terra, Mars
[1] Crater statistics indicate alluvial fans, crater floor, and fill/mantling deposits within impact craters >50 km in diameter in southern Margaritifer Terra were likely emplaced during multiple epochs: fans formed during the Amazonian or near the Amazonian‐Hesperian boundary, crater floor deposits are likely Hesperian in age, and most fill/mantling deposits are Amazonian. The regional distrib...
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ژورنال
عنوان ژورنال: Geological Society of America Bulletin
سال: 1966
ISSN: 0016-7606
DOI: 10.1130/0016-7606(1966)77[15:affnan]2.0.co;2