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Geological Society of Minnesota

Geological Society

of Minnesota

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Geological Society of Minnesota

Road Marker Information

Road Marker Information

Title: Geology of the Mankato Region
Road Markers

Description:

More Information

Enter Road Address in your cars GPS:
1042-1162 Lookout Dr, North Mankato, MN 56003

OR
Enter Geographical Coordinates in your cars GPS:

Degrees Lat Long :    44.165417, -94.037267

Latitude:       44°09’55.5″N
Longitude:   94°02’14.2″W

Go to Google Map

Country: Nicollet County
Where Found:

MANKATO REGION IS Located at an overlook at 1169 Lookout Drive in North Mankato

Exit Highway 169 onto Route 14.  Travel west on 14 to intersection with Lookout Drive (County highway 13).  Go south on Lookout Drive to the road sign “Geological Marker”.  Pull into the roadside parking area.

Marker Number:142
Marker Composition: Stone with Bronze plaques

Text on Marker:

This marker is located near the big bend of the Minnesota River directly opposite the mouth of the Blue Earth River. The abandoned channel east of it is the former course of the LeSueur before it joined the Blue Earth. Most of the broad valley of the Minnesota was carved out of bedrock prior to the last glacier which came from the northwest and partially filled the valley with debris. After the glacier melted, the river re-established itself in the old valley. The name “Glacial River Warren” is applied to the stage when it carried enormous volumes of meltwater from Glacial Lake Agassiz which for a long time occupied the Red River Valley region. The rocks exposed in this road cut are from bottom to top—Jordan sandstone, Blue Earth siltstone, Oneota dolomite (Mankato quarry rock) and glacial drift of two ages. The lowest rock is about 500 million years old and the upper drift at least 10,000 years. Erected by the Geological Society of Minnesota in memory of Alger R. Syme, past president and mentor in cooperation with the Department of Highways State of Minnesota. 1950

Region: South Central/West Region

Date Updated: 20160527

Information Needed:

  1. Marker Images

Condition of Marker: Good
Do it Yourself Region: Minnesota River Valley
Verification: Done – Becky

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© 2025 Geological Society of Minnesota - WordPress Theme by Kadence WP

  • Welcome Page
  • Road Markers
  • Members
    • Seminars and Labs
      • Seminar/Lab Calendar
      • Current Year Schedule
      • All Seminars and Labs
      • Directions to Seminars and Labs
    • Fields Trips
      • Field Trip Calendar
      • Help Field Trip Signup
      • Upcoming Field Trip
      • Field Trips Signup
      • Submit Field Trip Suggestions
      • Past Field Trips
      • Waiver of Liability
      • Waiver of Liability PDF
    • Calendars
      • Seminar/Lab Calendar
      • Field Trip Calendar
    • Member Information
      • Print a Membership Form
      • Enter in your membership form, then print
      • Membership application/renewal via credit card
      • Membership Help Document
    • Media Library
      • Media Library Order/Display
      • Help Using Media Library
      • Suggested Geology YouTube Videos
    • GMS T Shirts and Caps
      • Buy T Shirt and/or Cap
      • Help buying T Shirt/Cap
    • Newsletters
      • Display Newsletters
      • NLs from the MN Geological Survey
        • Newsletter JPG Large
        • Newsletter JPG Small
      • Contributing to the Newsletter
  • Link
  • Outreach
    • For Teacher
    • State Fair
      • State Fair Booth Rock Specimens List
  • About
    • History
    • Board
      • Display Board Minutes
      • Board Information
      • GSM presidents
    • Organization Information
      • Articles of Incorporation
      • By_Laws
    • Mission
    • Administrator Login
      • Administrator Login Help
  • Contact
    • Ask GSM
    • Ask ChatGPT a geology question
    • GSM USPS mailing address
  • Display Posts
    • Display Blog Posts List
    • Display Blog Posts by Category
    • Help Viewing Blog Posts