| Titre | Surficial geology, Thinahtea Lake, British Columbia |
| Télécharger | Téléchargements |
| |
| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Bednarski, J M |
| Source | Commission géologique du Canada, Dossier public 5479, 2008, 1 feuille; 1 CD-ROM, https://doi.org/10.4095/224965  Accès ouvert |
| Liens | Metadata - Métadonnées
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| Image |  |
| Année | 2008 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/224965 |
| Cartes | 1 carte |
| Info. carte | dépôts meubles, 1/50,000 |
| Media | papier; CD-ROM; numérique; en ligne |
| Liens | readme / lisez-moi
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| Formats | e00 (ESRI® ArcExplorer(TM) v. 2.0 is included / est fourni); shp; tif; pdf; JPEG2000 |
| Province | Colombie-Britannique |
| SNRC | 94P/09 |
| Région | Tinahtea Lake; Zeues Lake; Zeues Creek; Thinahtea Creek; Petitot River; Hostli Lake |
| Lat/Long OENS | -120.5000 -120.0000 59.7500 59.5000 |
| Sujets | glaciation; déglaciation; dépôts postglaciaires; dépôts glaciaires; dépôts proglaciaires; dépôts glaciolacustres; dépôts de lac proglaciaire; dépôts fluvioglaciaires; colluvions; alluvions; dépôts
lacustres; dépôts fluviaux; marges glaciaires; sediments de contact glaciaire; épandage fluvio glaciaire; plaines d'épandage fluvio glaciaire; deltas d'épandage fluvio glaciaire; cônes d'épandage fluvio glaciaire; chenaux d'eau de fonte; kettles;
mouvement de masse; dépôts de glissement de terrain; glissements; solifluxion; plaines d'inondation; terrasses; sédiments deltaïques; cônes alluviaux; alluvion; dépôts organiques; tourbières; marais; tourbières minérotrophes; buttes; pergélisol;
glace fossile; thermokarst; sables; graviers; silts; argiles; elements glaciaires; topographie glaciaire; tills; drumlins; erratiques; roches carbonatées; rainures glaciaires; moraines; crêtes de till; eskers; crevasses; directions des mouvements de
la glace; roches sédimentaires; grès; schistes; étages glaciaires; Wisconsinien; paléotopographie; variations du littoral; Formation de Dunvegan ; Groupe de Fort St. John ; Formation de Shaftesbury ; Calotte glaciaire Laurentide; géologie des dépôts
meubles/géomorphologie; Phanérozoïque; Cénozoïque; Quaternaire; Mésozoïque; Crétacé |
| Programme | L'Initiative géoscientifique ciblée (IGC-2), 2003-2005
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| Diffusé | 2008 04 01 |
| Résumé | (disponible en anglais seulement)
The surficial geology of the Thinahtea Lake (NTS 94 P/9) map area is dominated by the effects of continental glaciation during the Late Wisconsinan (ca. 25
000-10 000 years ago). In general the ice sheet advanced from the northeast, but the ice thinned during deglaciation and divided into distinct lobes. The map area became dominated by one lobe flowing southward from the Mackenzie River valley in the
north, and a second lobe in the south, occupying the Shekilie River. Glacial flutings in the northern part of the map area record the southern flow of the northern lobe. Thinahtea Lake itself occupies a large meltwater channel that was probably the
mouth of a large subglacial tunnel emanating from the northern ice lobe. Numerous eskers lie along the northern edge of the lake. Initially the northern and southern lobes were in contact along an area of hummocky moraine, just south of the Petitot
River, but once they separated meltwater collected between the lobes along the lowland occupied by the modern Petitot River with drainage to the west. The western part of the Petitot River valley, however, was initially occupied by the northern ice
lobe and the main drainage was forced southward along the northern margin of the Etsho Plateau. The Petitot River did not occupy its present course until the northern ice lobe retreated northward. Much of the map area is underlain by thick clayey
till and glaciolacustrine deposits, which are poorly drained and covered by extensive muskeg. Areas of thick peat are likely underlain by permafrost and probably contain significant amounts of ground ice. |
| GEOSCAN ID | 224965 |
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