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historicalmarkerproject/markers/HM1D17_ecological-connections_Olympia-WA.html
Grasses, flowers and other plants support the food web of prairies. Butterflies thrive on flower nectar and may use just one plant species to host their caterpillars. Bees pollinate the flowers. Ground-nesting birds hide their nests among the gras…
historicalmarkerproject/markers/HM1D16_mima-mounds-a-special-prairie_Olympia-WA.html
What Makes a PrairieGrasslands thrive where dry soil and frequent drought or fires limit or exclude trees and shurbs. The soils and climate in each of North America's grasslands support a unique mix of native grasses, flowers, and other plants.
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historicalmarkerproject/markers/HM1D15_scientists-still-search-for-an-answer_Olympia-WA.html
More than 30 explanation have been proposed for the origin of the Mima Mounds, but none has been proven.
Were the Mounds Created by Glacial Ice?In 1913 glacial geologist J Harlan Bretz completed the first detailed study of the Mima Mounds. Bret…
historicalmarkerproject/markers/HM1D14_what-we-know-for-sure_Olympia-WA.html
The Mima Mounds were formed some time after ice age glaciers began receding 16,500 years ago. Their origin has puzzled scientists and curious visitors since the mid-1800s. Research has revealed what we know so far about the glacial history of this…
historicalmarkerproject/markers/HM1D0V_mima-mounds-the-mysterious-work-of-nature_Olympia-WA.html
Early Encounters, Early HypothesesThe Mima Mounds intrigues travelers and explorers in the 1800s as described in their journal entries.
MAY 20, 1841Charles Wilkes, commander of the United States Exploring Expedition from 1838 to 1842, thought t…