Upload
others
View
7
Download
0
Embed Size (px)
Citation preview
¹ »¹»
»
k80
20
7526
20
2020
73¹
¹
»
¹k Volcanic Dip
Dip Of Fault
Sedimentary Dip
Fault
Traverse Line
Symbols
Contact
Bedrock Outcrop
ReferencesMiller, J.D., Jr., and Green, J.C., 2008, Bedrock Geology of Duluth Heights and Eastern Portions of the Adolph Quadrangles, St. Louis County, Minnesota. Minnesota Geological Survey Mis- cellaneous Map M-181, Scale 1:24,000. Miller, J.D., Jr., and Green, J.C., 2008, Bedrock Geology of West Duluth and Eastern Portion of Esko Quadrangles, St. Louis County, Minnesota. Minnesota Geological Survey Mis- cellaneous Map M-183, Scale 1:24,000.
µ0 1,000 2,000 3,000 4,000500
Feet
0
250
500 750 1,000125Meters
Duluth Complex: Gabbro - Medium to coarse grain, Olivine, Pyroxene, Plagioclase Feldspar, Magnetite in Pyroxene. Large Pyroxene Crystals Indicating water in magma during crystalization, which also means near a contact zone.
Ely’s Peak Basalt: Basalt - Pyroxene rich basalt with vesicle columns throughout . Fine grain basalt domin- ates the southern half of the Ely’s Peak Basalt and coarse grain basalt in the north half. Some areas are Amygdaloidal. Some Porphoritic zones scattered through formation.
Nopeming Sandstone: Interbedded meta-siltstone and meta-quartzite, lying uncomformably on top of Thompson Formation. Deposited through alluvial deposits or possibly lakes.
Thompson Formation: Interbedded slate and grey- wacke with concretions throughout the bed. Also Quartz veins are present throughout the bed. The out- crops exhibit cleavage parallel/sub-parallel to the bed- ding plane. The bed is dipping steeply throughout, about 70 to 80 degrees.
Meso-Proterozoic
Paleo-Proterozoic
1450
1200
950
750
Cross Section
Description Of Units
Correlation Of Map Units
A’A
A A’E
leva
tion
Ga
Ba
Ss
Gw
Ba
Ba
Ba
Ss
SsGw
Gw
Gw
Ga
Ga
Ga
Ga
Ba Ss
Gw
BaGa
Ss
Gw
Wesley R. Lueck University Of Minnesota Duluth
5/8/2010
Bedrock Geology Of Midway AreaEsko Quadrangle By