minnesota Flashcards
where did the laurentide ice sheet centre over
what is now hudson bay
which landcsape did the laurentide ice sheet transform
the lanscape of northern usa and canada
which geology shield is Minnesota a part of
the laurentide shield
where do minnesota’s oldest rocks lie and what is this geology like
in the northern half of the state near the minnesota river valley, belts of volcanic and sedimentary rocks
where are there mountains in minnesota and what caused this
tectonic compression formed a mountain range several kilometres high in the northern part of the state
when did the lobes extend from the laurentide ice sheet
75,000 years ago
what impact did erosion have on mountains in minnesota
high mountains were worn down so that today peaks in minnesota do not exceed 700m
what erosional impact did the ice sheet have which led to lakes
a large ellipsodal basin was created which today is studded by the upper and lower red lakes in northern minnesota
which area of minnesota was not as extensively covered and what has this resulted in
the far se of the state was not as widely covered by the ice sheet which has resulted in a more varied landscape with steep hills and valleys
what were the three lobes that extended from the laurentide ice sheet
wadena lobe, des moines lobe, superior lobe, rainy lobe
what significant depositional landforms has the wadena lobe contributed to
the wadena lobe first deposited the alexander moraine which forms the drumlin fields over the otter tail, todd and wadena counties
how did proglacial lakes form from the laurentide ice sheet
the edge of the giant ice sheet dammed the natural drainage of the area
what was the largest proglacial lake formed by the laurentide ice sheet
lake agassiz
how much land did lake agassiz cover at its maximum
440,000km2
what is the land that lake agassiz was on occupied by today
the red river valley of Minnesota and North Dakota
