This document announces a walking tour of Doan Brook Gorge on June 7, 2014 hosted by the Doan Brook Watershed Partnership and Natural History Museum. The tour will explore the geological features of the gorge including bedrock exposures from the Devonian period 370 million years ago. It will also examine the natural and cultural history of the gorge and surrounding area. Participants are asked to RSVP by contacting the email provided. The event is part of a series of history hikes exploring the human impact and development of the gorge over time from early settlers to modern suburbanization.

1. Doan Brook
Watershed
Partnership
3 pm, Sat, June 7, 2014
Roy Larick
Bluestone
Heights
Doan Brook gorge, looking southeast
Doan Brook
Watershed Partnership
USGS LiDAR underlay; Google Earth aerial viewer
for the
Maple RidgeTurkey Ridge
RSVP
gilmore@doanbrookpartnership.org 216-325-7781
Doan Brook Gorge
walking tour
With support from
Natural History
Meet: Fairhill Partners campus: 12200 Fairhill Road, Cleveland, OH 44120

2. Doan Brook gorge, looking southeast
Between Turkey and Maple Ridges,
glacial melt water carved sandstone
and shale. Bedrock exposures evince
the Age of Fishes sea of 370 million
years ago.
The Natural History gorge hike
explores the bedrock and the deep
history of fast-changing natural and
cultural features.
USGS LiDAR underlay; Google Earth
This event sets the stage for
history hikes on the gorge’s
Early Settlers (8/23) and
Suburbanites (19/18).
Maple
Ridge
Turkey Ridge

3. Doan Brook rocks
During the Late Devonian Period, 370 million years ago, our
region lay near the Equator, in the Ohio Basin Sea. The nearest
land was 150-200 miles to the east. Chagrin and Cleveland
Shale fossils indicate a muddy sea bottom. The sea had many
fish; few were fossilized.
Redrawn from
Hannibal & Feldmann
The Explorer 27(1), 1985
Age of Fishes Ecology

4. Doan Brook and the Portage Escarpment
Just 23,000 years ago, the last glacial advance bulldozed the Portage Escarpment to create
two terraces, one atop the Berea Sandstone and, just below, atop the Euclid bluestone. To
create its gorge, Doan Brook cut through these hard rocks and underlying soft shale.
Gulch and Gulf
In early settler days, a deep ravine with craggy cliffs could be called a
gulch. A wider ravine with vertical sides could be called a gulf.
In the Berea Sandstone, Doan Brook carved its gulch. In the bluestone
and underlying shale, the brook dug its gulf.
Doan Brook Gorge

5. © 2014
Bluestone
Heights
moraine
west tip
Delaware ravine. Top lip of the gulch.
Doan Brook
Gorge
Euclid bluestone
gulf landscape
Berea Sandstone
gulch landscape
Gulf S wall, above Fairhill.
Bluestone level near top.
Gulf S bank, upstream
from MLK. Bluestone level
near bottom.
NCSL
In the Berea gulch. Transition
from massive to flaggy beds.
Cleveland Memory Project
CMP
W.C. BarrowTurkey
Ridge
Maple
Ridge
North
Ambler
Heights
USGS LiDAR underlay
Google Earth aerial viewer
stone
culvert
Gulf S cliff. Fine
flaggy bedding at
top of the Berea
sequence.
Trough cross-
bedding within
the Berea
flaggy beds.
Cle Water Dept
Gulch N cliff, 1894, view W to grist mill ruins.
Gulf N wall, above North Park.
Bluestone level near top.
gulf & gulch
R. Larick
R. Larick
R. Larick
Cleveland Memory Project
R. Larick

6. Doan Brook
Watershed
Partnership
3 pm, Sat, June 7, 2014
Roy Larick
Bluestone
Heights
Doan Brook gorge, looking southeast
Doan Brook
Watershed Partnership
USGS LiDAR underlay; Google Earth aerial viewer
for the
Maple RidgeTurkey Ridge
RSVP
gilmore@doanbrookpartnership.org 216-325-7781
Doan Brook Gorge
walking tour
With support from
Natural History
Meet: Fairhill Partners campus: 12200 Fairhill Road, Cleveland, OH 44120