First: A special thanks goes out to James B. Short of Montpelier, Ohio for introducing me to our own local geologic fault. ALSO Jeff Fox (Ohio Seismic Network) for all his guidance and bringing LCHO back from the dead!
Now a map…Farnsworth Metro Park, south of Waterville, OH
Like me, you may have driven right past it many times and never saw the sign…
100 miles Long? Where does it run?
See it? Now let’s try putting a road map over it….
Yes, this is crude. Get over it….Find I-75(Red) between Bowling Green and Findlay. The BG fault runs south from Michigan, west of I-475 and I-75 then crosses south of Findlay.
Also notice there is a fault that follows the Maumee River to Lake Erie.
So what kind of fault is it? According to my connections at Ohio Seismic Network, ” Those faults are either dormant or dead. It’s hard to determine the stresses on the fault unless they slide, and it’s been a long time since that has happened…as far as we know!”
Long time indeed….
The “big one” in Ohio was the 1937 Anna Quake M5.4 (East-Central Ohio)
Those little ones (19 by my count) in the Maumee and BG fault area were recorded between 1937 and 2011. The magnitude range was from 2(few will notice) to 4(felt by most people, some dishes/pictures fall, cracked plaster.) ((Ohio Seismic Network)
So…. There is no such thing as “solid rock”. It can be very firm, but never stationary. The only thing constant, it change.
Now here is my hike around my first real fault.
Past the historic marker down the steep path towards the river.
Noted…but odd….it’s not a trail but it’s a trail?
Down the “trail/not trail” looking back at historic marker…
Picture on marker. Solid yellow lines were at same level 400 million years ago. Broken line is BG fault.
My image with red dots for same level and broken red is the fault.
Close up on left.
Close up on right…
“My fault”, in the middle with knife for size.
I know it is not very easy to see this. I was there and am still confused…The point is the rock is layered(normal) but slanted and twisted(not normal).
My plan is to return when the the vegetation is gone this fall, take better pics, then stand in the middle and wait for the BIG ONE. 😉