In the Beginning –
Geology, Glaciation and Geography
In the beginning…
That is the usual place to start a history of about anything,
so it seems appropriate to begin this one the same way.
Meridian’s beginnings, like every other place on Earth, started
with the condensation of a ring of dust and debris around the sun. That ring of
dust and debris became the series of planets that make up our solar system. Meridian’s
real history begins with the most recent Ice Age, which lasted over 100,000
years, ending between 10,000 and 15,000 years ago.
USGS.gov
The current climate is appreciably warmer than it was during
the Ice Age (and the current climate change is accelerating that warming).
During the Ice Age, Meridian was covered by glacial ice a mile thick. That ice
created the peculiar terrain of the area, scouring away the earth in some
places, and depositing soil and rocks in others.
If you look around, you will notice the uncommon landscape
that surrounds Meridian. The village sits in the middle of a large field
(sometimes called a “swarm”) of glacially formed hills called “drumlins.” There are about 10,000 drumlins in upstate
New York, following the southern shore of Lake Ontario. There are drumlins on
the floor of Lake Ontario itself and another 7,000 drumlins exist across the
Lake on its northern shore in Canada.[1] There are other drumlin swarms elsewhere on
earth, but Central New York’s swarm is bigger than most and it fascinates
geologists.
Drumlins follow the direction that the glaciers traveled. As
these massive rivers of ice moved southward, they sculpted the land. Drumlins
are the very visible evidence of the glaciers’ movement.[2] Those around Meridian are aligned askew from
true north-south, inclined slightly to the northwest. The shape of drumlins has
been compared to that of whales, long and narrow. The north ends of drumlins
are usually a steep slope, with the southern slopes having more gentle
gradients.[3] Traveling from east to west or vice versa,
over the tops of the drumlins and into the valleys between them, can sometimes
feel like riding a roller coaster.
Drumlin Field: Wayne
County, NY
Shaded Relief Imagery,
derived from the USGS
Geological Survey National Elevation Dataset,
Modified by
Pollinator. (Public Domain)
The eastern entrance to the village on Route 370 cuts
through a drumlin. The northern half of that drumlin used to be called “Butter
Factory Hill,” because, of course, there was once a butter factory there.
[1] Kerr,
M. and Eyles, N., “Origin of drumlins on the floor of Lake Ontario and in upper
New York State”, Sedimentary Geology, 193(1-4):7-20, American Geological
Institute, 2007.
[2] Tarr,
Ralph S., The Physical Geography of New York State, New York: The McMillan
Company, 1902.
[3]Fairchild,
Herman L., Pleistocene Geology of New York State,” Bulletin of the Geological Society of America, Vol, 24, pp 133-162,
25 March 1913.
[4] Thompson,
John E., Editor, Geography of New York
State, Syracuse, NY: Syracuse University Press, 1966, 1977.
[5] Von
Engeln, O.D., The Finger Lakes Region:
Its Origin and Nature, Ithaca, NY: Cornell University Press, 1961.
No comments:
Post a Comment