Former southwesterly ice flows in the Abitibi–Timiskaming region: implications for the configuration of the late Wisconsinan ice sheet
Former southwesterly ice flows in the Abitibi–Timiskaming region: implications for the configuration of the late Wisconsinan ice sheet
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阿比蒂比-蒂米斯卡明地区前西南冰流：对威斯康星州晚期冰盖结构的影响
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发表时间：
1986
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影响因子：
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通讯作者：
J. Veillette
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作者：
J. Veillette
在魁北克和安大略省Abitibi-Timiskaming地区约300个横纹点的测量揭示了两个以前的冰流方向：一个是位于该地区最西部的较老的西-西南方向(230-270°)，另一个是位于哈里卡纳湖-麦康奈尔湖冰川复合体以西的较新的、分布广泛的南-西南方向(180-220°)。这些较老的条纹，无论是位于同一露头上的一个或两个，几乎到处都有年轻的无处不在的流向东南偏南(130-170°)的痕迹。根据安大略省Timmins和Matheon地区和魁北克Selbaie矿区非冰川沉积物在较老冰犁下测量的条纹方向和三个日期，最古老的西南向(230-270°)条纹暂时与沉积最低的西-西南气流有关，直到威斯康星州时间早期到中期或更早。Harricana-Lake McConnell冰川系统从詹姆斯湾延伸到...
Measurements at some 300 cross-striated sites in the Abitibi–Timiskaming area of Quebec and Ontario revealed two former directions of ice flow: an older west-southwest one (230–270°) in the extreme western part of the area, and a younger, widespread south-southwest one (180–220°) in the region west of the Harricana – Lake McConnell glaciofluvial complex. These sets of older striae, whether one or both on the same outcrop, are almost everywhere crossed by marks of a younger ubiquitous flow to the south-southeast (130–170°). On the basis of striae directions measured below an older till and of three dates obtained from intertill (below the surficial till) nonglacial sediments in the Timmins and Matheson areas in Ontario and the Selbaie mine area in Quebec, the oldest west-southwest (230–270°) striae are tentatively associated with the west-southwest flow that deposited this lowermost till in early to mid-Wisconsinan time or earlier.The Harricana – Lake McConnell glaciofluvial system extends from James Bay t...