Geologic History of the Rochester Area

These day trips into Rochester’s geologic history, filled with drumlins, eskers, kames, kettles, fossils, house-sized boulders and a meromictic lake, will remind you just how amazing the Earth is!

Earth Science Week is October 13-19, 2019.

Geologic History: Chimney Bluffs State Park

Chimney Bluffs

The bluffs, rising 175 feet above Lake Ontario, are fragile drumlins, like all of the truncated drumlins along this section of shoreline.

This area of New York State “contains one of the largest drumlin fields (12,000 km2) on the North America continent consisting of some 10,000 drumlins located between Lake Ontario in the north and the Finger Lakes.”

Learn more: Drumlins in Wayne CountyNew York State Geological Association 2000 Guidebook page 116

Rochester's Geologic History: Mendon Ponds Park Devils Bathtub

Mendon Ponds

The Devil’s Bathtub is one of New York’s rare meromictic lakes. It’s so deep, and so protected by the geologic features around it, that the layers in the water do not mix, or “turn over”. 

In 1969, Mendon Ponds Park was named to the National Registry of Natural Landmarks due to its geologic history and presence of significant kames, eskers, and kettles.

Learn more: Glacial Geology of Mendon Ponds Park, Glacial Geology

Rochester's Geologic History: Mount Hope Cemetery
Mount Hope Cemetery

Mount Hope Cemetery

Take the Geology Tour and you’ll learn about ice age land-forms (kames, moraines, kettles), the type of stones that make up gravestones, mausoleums and the ground you’re standing on, and residents who influenced the sciences during their time above ground.

You’ll learn to look for every minute detail as evidence in our big history!

Lower Falls Maplewood
Lower Falls in Maplewood Park

Lower Falls Gorge

In the Lower Falls section of the Genesee River gorge, the material at the bottom was deposited 430 million years ago; at the top, 410 million years ago. You are looking at 20 million years of geological deposition in a gorge that was carved in the last 10,000 years

Learn more: lowerfalls.org, Thomas X. Grasso’s Geology and Industrial History of the Rochester Gorge Part One, Lower Falls Foundation, NYSGA

Western New York's Geographic History: Little Rock City in Rock City New York State Forest
Little Rock City in Rock City State Forest

Little Rock City

Little Rock City was not formed by glaciers, but through mountain building events known as orogenies. As sediment from surrounding areas was deposited over Rock City State Forest, the base for Little Rock City was formed.

As hundreds of years passed, gravity erosion of the landscape began to separate non-resistant rock layers from those which were highly resistant, leaving us with the large boulders that are present today.

Learn more: 4 Rock Cities Near Rochester, Cattaraugus County Geology Trail

Panama Rocks scenic
Panama Rocks

Panama Rocks Scenic Park

Panama Rocks is reputed to be the most extensive formations of glacier-cut, ocean-quartz conglomerate in the world, forming a ridge half a mile long. The history of the rock formations date back about 400 to 350 million years ago (Ma), during the Devonian period.

To provide perspective on the age of these formations, it is believed that the first animals classified in the genus Homo appeared only 2Ma. Modern humans (Homo sapiens) are believed to have originated about 200,000 years ago.

Learn more: Panama Rocks Scenic Park, 4 Rock Cities Near Rochester, Tour Chautauqua

Western New York's Geographic History: Penn Dixie Fossil Park Nature Reserve
Penn Dixie Fossil Park and Nature Reserve

Penn Dixie Fossil Park and Nature Reserve

Visitors can find and collect 380 million year-old animal and plant fossils that once flourished in an ancient tropical sea that covered Western New York.

In 2011, The Geological Society of America ranked Penn Dixie as the No. 1 fossil park in the country.

Learn more: Penn Dixie Field Guide, They’ll never run out of fossils at Penn Dixie

MacKay Wildlife Preserve
MacKay Wildlife Preserve

MacKay Wildlife Preserve

The incredible rocks found within the preserve’s 26 acres have been studied by geologists, and some were determined to be 380 million years old. They contain fossils from our tropical-sea days. There is a sea of moss-covered boulders toward the field wall.

Cal-Mum science teachers take classes here to explore the geology and biodiversity.

Learn more: History of MacKay Wildlife Preserve

Eternal Flame Trail Chestnut Ridge Park Buffalo
Eternal Flame

Eternal Flame

It seems that there’s only one waterfall in the world with a flame burning beneath it. This is the Eternal Flame Waterfall, on Shale Creek, in Chestnut Ridge Park, near Buffalo, New York.

A pocket of natural methane gas in an alcove below the waterfall seeps out through a fracture in the rocks. The flame goes out from time to time (it’s not really eternal) but is easy to relight. We’ll probably never know who the first person to light it was.

Learn more: EPOD USRA Eternal Flame

Green Lakes State Park red
Green Lake

Green Lakes State Park

Both Round and Green Lakes are meromictic lakes, which means that there is no fall and spring mixing of surface and bottom waters. Such lakes have a high potential for evidence of ancient plant and animal life.

Learn more: NYSGA

Bergen Swamp
Bergen Swamp

Bergen Swamp

The Bergen Swamp is a 10,000 year old natural ecological succession following the retreat of the glaciers. The lichens were the first organisms to grow on the barren rock left by the retreating glaciers.

It is the first ever private environmental land trust in the United States chartered as a New York State living museum, and the first such site to be designated a National Natural Landmark.

Honeoye Lake from Harriet Hollister
Honeoye Lake from Harriet Hollister

Finger Lakes Region

The Finger Lakes consist of 11 long, narrow, roughly parallel lakes, oriented north-south as fingers of a pair of outstretched hands. The southern ends have high walls, cut by steep gorges. Seneca and Cayuga Lakes are among the deepest in North America and have bottoms below sea level.

These lakes all formed over the last two million years by glacial carving of old stream valleys. The actual depth of carved rock is well over twice as deep, but it has been filled with sediments; there may be as much as 1000 feet of glacial sediment in the deep rock trough below the lake-bed.

Learn more: Paleontological Research Institute

Cobbs Hill Pinnacle Hill summer
View of Pinnacle Hill from Cobb’s Hill

The Five Pinnacle Hills

The Five Pinnacle Hills are Mount Hope, Highland, Pinnacle, Cobb’s, and Oak, which is now the University of Rochester campus. Yes, Oak Hill Country Club was located there next to the river from 1901-1921 before moving to Pittsford.

Best New York Attractions - Niagara Falls American Falls
Niagara Falls American Falls from the Crows Nest

Niagara Falls

Approximately 12,000 years ago water found a single low pathway through the “Niagara Escarpment“, and began to carve out a channel—the Niagara River. At that time, however, “Niagara Falls” was about seven miles downstream—Lewiston, NY and Queenston, Ontario.

Over the last 12,000 years erosion of the resistant rocks that cap Niagara has allowed the Falls to migrate about 7 miles upstream, and form the high-walled Niagara Gorge along its former path.

Learn More: New York State Museum – Niagara Gorge Geology

Grimes Glen Second Fall
Grimes Glen, 2nd Fall

Grimes Glen

The Glen is known for its waterfalls. However, it is best remembered as the source of the oldest fossilized tree in New York.

The so-called Naples Devonian Tree was discovered in the glen by D. Dana Luther in 1882. A Naples native who served as President of the village, was a descendent of pioneers who first settled the town. Born in 1840, Dana Luther became interested in geology and spent many years assisting the research of his nephew, Dr. John M. Clarke, State Geologist and State Paleontologist for many years.

Mr. Luther served on Clarke’s staff at the State Museum from 1891 to 1916. The fossilized tree that Luther discovered in Grimes Glen was removed by paleontologists in 1887 and put on display in the State Museum in Albany.

Learn more: Ontario County

Things to do around Rochester NY: Letchworth State Park NY
Letchworth State Park NY

Letchworth

400 million years of geologic history can be seen in the walls of the gorge at Letchworth State Park and are from the Devonian Age.

The rocks in the gorge are sedimentary. Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material. Gradually, the sediments accumulate and over time and harden into rock. Sedimentary rocks are, in general, are fairly soft and can crumble easily.

The rock in the gorge is mostly shales with some limestone and sandstone. Some layers of rock have a red color to them. This red coloring is due to iron oxide in the rocks from being deposited during a high oxidizing environment.

Learn more: Geocaching Letchworth

Howe Caverns

Scientists believe nature began to slowly craft Howe Caverns some six million years ago; long before even the ancient, extinct animal known as the woolly mammoth appeared on Earth. The caves are one of a very small number of mineral caves (living limestone cave) in the world.

Because the limestone beds laid down by the ancient sea creatures were softer than many rock formations (such as marble or granite), the rain water trickling down from the ground above soon began to erode the top layers. Small cracks opened up to the layers below, and the rain water dissolved its way through them, too.

In time, the small cracks grew to be large cracks through which underground streams flowed. And that is how the great cave formations and winding passageways of Howe Caverns were formed: over the course of millions of years, underground brooks and streams gently carved them out of the solid limestone deposits left behind by sea creatures eons before.

Learn more: Science & Geology of Howe Caverns

Paleontological Research Institution and its Museum of the Earth in Ithaca NY
Museum of the Earth in Ithaca

Museum of the Earth

Museum of the Earth focuses on life beginning in the Cambrian Period, though it delves a little into our 4.5 billion year history.

We’re basically learning about the entire Phanerozoic Eon, including the Paleozoic (era of plants), Mesozoic (era of dinosaurs, birds and the breakup of Pangaea), Cenozoic (era of mammals), and our current Quaternary period (Ice Age and humans).

Book Roadside Geology
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Learn more about our geologic history and geoscience

Library Book: Roadside Geology of Western New York

Library Books: Various publications by Herman Fairchild

Rochester Museum & Science Center

Buffalo Museum of Science

Rochester Academy of Science

Buffalo Geological Society

New York State Geological Association + Field Trip Guidebooks

The Geological Society of America

American Geosciences Institute

Glacial Geology of Western New York

Geology of New York State

Geologic units in Monroe County, New York

Geological History and Glacial Formations of the Finger Lakes

Paleontology and Stratigraphy of the Rochester, New York, Area

Genesee Valley Glacial and Postglacial Geology from 50,000 Years Ago to the Present: A Selective Annotated Review

Western NY Geology: The Land Before Time

1902 Bulletin of this United States Geological Survey

Geology of the Erie Canal, Rochester Gorge, and Eastern Monroe County, New York State – In the Footsteps of Amos Eaton and James Hall

49 New York State Parks Within a 2-hour Drive of Rochester

Venture into one of these New York State Parks within a 2-hour drive of Rochester and discover what makes them each unique!

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14 Hidden Places Around Rochester

We drive past some of Rochester’s most unique features every day, completely unaware that these hidden places are just minutes away from where we live.

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Panama Rocks Scenic Park

Watch your footing, know your limits, and use common sense when it comes to climbing on the boulders at Panama Rocks Scenic Park.

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11 National Natural Landmarks near Rochester

These National Natural Landmarks, recognized for their outstanding biological and geological resources, are all within a two-hour drive of Rochester, NY.

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20 Monroe County Parks

Monroe County parks are free, so take advantage of 12,000 acres of natural, zoological, horticultural, historical and geological experiences!

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26 Incredible Creeks Around Rochester

These beautiful creeks around Rochester impact us in such subtle ways they sometimes disappear into the background of our lives.

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4 Rock Cities Near Rochester

Explore these cool, quiet, mossy rock cities near Rochester, with boulders the size of houses! You’ll love Panama Rocks, Rock City Park, Little Rock City, and Thunder Rocks in Allegany State Park.

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Where are your favorite spots to explore Rochester’s geologic history?

Share your thoughts with us in the comments. Your insight and experience is invaluable!

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