rockefeller-on-doan hike handout
Post on 18-Jul-2015
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Lay down – uplift – sculpt
Looking SE up Doan Brook to the Portage Escarpment
Rockefeller-on-Doan explores park landscape in the hand of natural and human forces.
Find evidence for the rise of local bedrock, for bulldozing glacial ice and for Doan Brook’s cutting of a beloved ravine.
Review the impacts of park development, including the outstanding Cleveland Cultural Gardens.
See the recently completed Doan Brook Enhancement Project in terms of stormwater mediation and the restoration of local natural habitats.
Portage Escarpment bedrocks were laid upon the Late Devonian sea bottom, >350 Ma (million years ago). Mud built the shales (Chagrin, Cleveland and Cuyahoga). Silt built the Euclid bluestone. Sand gave Berea and Sharon sandstones.
Rockefeller-on-DoanRock – Ice –Water
Portage Escarpment Timeline
Tropical sea bottom
Glacial sculpting
June 6, 2015
sandstone terrace
bluestone terrace
Glacial advance
USGS LiDAR; Google Earth aerial viewer
Hiking Rockefeller Park south
© 2015Bluestone Heightsbluestoneheights.org
Gesu School
kakakakaMaMaMaMa
Lake Erie rises to present levelNiagara River lowers Lake ErieFinal glacial retreatFinal glacial advanceGlacial advances beginNorth American upliftEuclid bluestone depositedChagrin Shale deposited
• Reviving the natural regulation of stormwater at low cost and high community benefit.
• Reconnecting fragmented natural habitat areas as a means to build local biodiversity.
In learning natural history and the ways in which natural & human forces interweave, we can better address two crucial local environmental issues.
Rockefeller Park lies on Doan Brook as it leaves the Portage Escarpment, Cleveland’s major terrain feature
As the last glacier retreated northward, rushing melt water spawned our ‘escarpment run’ streams including Doan and Dugway Brooks.
Bedrock deposition, glacial sculpting and stream cutting produced the ‘Rockefeller’ landscape.
We have buried our streams and flattened our features. With development, environment is degraded and biodiversity is reduced.
Humans
Devonian earth
LM
ich
igan
LM
ich
igan
L Huron
L Huron
About 300 Ma, our area uplifted from the sea. The Ohio and Saint Lawrence watersheds began to form. Much later, about 2 Ma, the earth cooled and great glaciers began mounting in northern North America.
Lake Erie ~570’ above sea level
Uplift
we-are-stuff
4
12.6
16
23
2.5
300
360
370
pro-glacial lakes
Roy Larick, Tori Mills, Graham Welling
Rock – Ice – Water – Humans
Blue Rock
lake plain
Just 23 ka (thousand years ago), the last glacial advancebulldozed the rock sandwich slope (Portage Escarpment) to create two terraces: one atop the Berea Sandstone and one atop the Euclid bluestone.
Sixteen thousand years ago, the last glacier retreated through our area. The ancestors of Lake Erie began to emerge. Just 14 ka, Doan and nearby streams cut through escarpment to create the ravines of today.
© 2015Bluestone Heightsbluestoneheights.org
glacial terrace – fossil beach – stream courses – springs
Rockefeller Park, c. 1900
No
rth
K. Roberts
K. Roberts
USGS LiDAR underlayGoogle Earth aerial viewer
Stream culvert data courtesy of NEORSD
R. Larick
Blue Rock spring, c. 1900
Rockefeller Park, 1897
R. Larick
Rockefeller Park Spring, 1911
Rockefeller-on-Doan
Cleveland Heights
Cleveland
Portage Escarpment, St Clair Terrace & lake plain
Ambler spring, near Fairhill Rd
Wade Park Spring. 1900
CMP
CMP: Cleveland Memory Project
ceveland.about.com
Wade Oval, 1874
Rockefeller Park
Rockefeller Park
CMP
CMP
CMP
CMP
WRHS
East Cleveland
Early settlers valued clear (Wade, Rockefeller).Victorian water cure valued mineral (Ambler, Blue Rock).
Eddy gristmill, 1809Cozad gristmill, 1830sCrawford sawmill, 1830s
Springs
Mills
E 1
05
th
Wade Park
Euclid
D.J. Lake
hike pathway
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