acp

Long_Island Coastal/Glacial Landscape

Montauk Point
Make careful observations of the following images:
On your worksheet, describe the agent of erosion in image #1.  What evidence did you use to make this inference?
Image #1
Look at the objects circled (in white) in image #2.  On your datasheet, compare and contrast the sizes of these (circled) objects to the sizes of the majority of the sediments in the formation.  What can you infer from your observations about the origin of this deposit formation?
The RED outlines areas of extensive erosion compared to the rest of the formation.  On your datasheet, explain why erosion occurred faster in these outlined areas then with the surrounding sediments.
Image#2
When you have completed answering the questions at this location you can fly off to your next stop, Ditch Plains.

Montauk Point

Camp Hero
The following images show the nature of erosion and deposition resulting from the wave action on this part of the Ronkonkoma Moraine.  The constant battering of the coast here by the waves has revealed many sediments.
On your datasheet, describe the evidence in the images that supports the inference that this material was originally deposited by a glacier?
Image #1
Image #2
Notice anything in the water to the right-rear of the erratic?  What do you think it is?

Ditch Plains
Scroll through the following images.  On your datasheet, answer the questions that precede each image.
The first 2 images show extensive erosion exposing material from the Ronkonkoma Moraine.
Question 1: What is the agent of erosion that created the formations in these images?
Image 1
Image 2
The third image shows an unusual pattern created in the sand. Make 2 observations of the sand in the image.
Question 2:  Besides quartz, infer what other minerals might be creating the darker colored sand.
This darker colored sand is found close to the water's edge where the waves break.
Question 3:  Explain why very little if any dark sand is found further up the beach near the dunes.
(hint)  Generally, Long Island sand is light in color and composed primarily of the mineral quartz.
Image 3

Ditch Plains

The Dunes at Hither Hills
These next images showcase some classic dunes on Long Island. Observe each of the images carefully. Each image has a group of people for scale.
Using a pencil, on your worksheet draw a simple pencil diagram of a dune. On your diagram indicate the direction of wind flow.
Describe how sand particles are piled into this dune shape in terms of gradient.  Be sure to include the words "windward" and "leeward".

Hither Hills

Indian Wells Beach, Amagansett
The beach at Indian Wells, Amagansett is a mere 16 miles from Montauk Point but exhibits very different qualities. Make several observations in terms of erosion, deposition, and particle sorting here. Compare and contrast the images of this beach to the images from the beach at Camp Hero.
Image #3 shows one of the dunes at Indian Wells.
How does this dune compare/differ from the dunes at Hither Hills?
What reason might you infer that would explain this?

indian wells

North Ferry, Greenport
View from the North Ferry traveling from Greenport to Shelter Island.

Greeport

Sag Harbor Fire Department
Large erratic sitting in front of the Sag Harbor Fire Department. A 45in steel straight edge is used for scale.

Wildwood Kettle Lake
Images of Wildwood Lake in the town of Riverhead.  This lake, like many others on Long Island is classified as a Kettle Lake.

Ronkoma Moraine
Ronkoma Moaraine Looking north from Sunrise Highway within the 1995 brush fire area in Westhampton. Eastern LI Doppler radar can be seen in the distance atop the Ronkonkoma Moraine.

Wildwood Lake

Ronkonkoma Moraine
This view from Route 111 (Capt. Daniel Roe Highway) looks across the outwash to the moraine out here in Manorville is a seris of confluent cones. This shape is most likely the result of erosion by glacial meltwater streams.

Hickory Bend, Speonk

Old Country Road at Speonk
Old Country Road across from Hickory Bend is the Carter Nursery and this erratic. 40d 49’ 39.3”, 72d 41' 34.9"

Westhampton

USB Health Science Center Parking Garage
These erratics were found near the Health Science Center parking garage. A total of four and one with interesting texture. What type of rock is the one in the last image (close-up)? How can you tell? 40.91N, 73.11W

USB North of Emergency Room Entrance
Three views of an erratic found just west of the USB emergency room entrance on the north side of Science Center Drive (East Loop Road). 40.908N, 73.11W.

Stony Brook University Main Entrance
The first 3 images show erratics that were uncovered during construction excavation at the main entrance to Stony Brook University. My 8" x 11" notebook is used for scale. The final 2 images are of an erratic that had been exposed at an earlier date.

Stony Brook

Large Galcial Erratic
This large erratic sits atop the Harbor Hill Moraine in Stony Brook at the intersection of Nicholls Road and the South Entrance to the University. The Harbor Hill Moraine is situated along the north shore of Long Island. 40.90N, 73.116W.

More Shrine erratics
These next two images show two more large erratics located on Rock Hill near the Shrine. In the first image my (9" X 12") clipboard is used for scale and in the second image a 45" steel straight edge is used for scale.

A view from the top
These are a couple of views looking to the south from the top of Rock Hill. The first image looks south towards Moriches Bay and the second image looke to the southeast towards Westhampton. This location is at the top of the Ronkonkoma Moraine in eastern Suffolk County. The images look out over the outwash.

The Shrine
The Shrine of Our Lady of the Island is place atop a very large erratic at the top of Rock Hill in Eastport. Image #2 shows how the erratic looked over 100 years ago.  A 45in steel straight edge is used for scale in images 3, 4, and 5.

Rock Hill

Lake Ronkonkoma - a Glacial Kettle Lake
Lake Ronkonkoma in central Long Island is classified as a circular or oval type kettle lake. It has a depth of approximately 50 feet. The elevation of the surrounding surface is approximately 107 feet above sea level. (Fuller, 1914) 40.96N, 73.12W

Lake Ronkonkoma

Scuttle Hole Road looking northwest
This image was taken from Scuttle Hole Road looking to the northwest. You can clearly see the moraine reaching up behind the homes. The farm field is clearly in the outwash plain. 40.96N, 72.32W.

Further up the hill at Old Sag Harbor Road
These images were taken further up the hill at the new development across from Old Sag Harbor Road. 40.98N, 72.32W.

Brick Kiln Road north of Scuttle Hole Road
This monster erratic was hidden in the hillside along the eastern side of Brick Kiln Road about 1 mile north of Scuttle Hole Road. Meter stick is for scale. 40.97N, 72.32W.

Brick Kiln Road at Old Sag Harbor Road
Further south on the east side of Brick Kiln Road at the intersection of Old Sag Harbor Road are several erratics uncovered during excavation for a new home development. These images cover 4 of these monsters located at the bottom of a hill near the road. Images 1 and 2 are different views of the same boulder and images 4 and 5 are different views of another boulder. Meter stick for scale. 40.98N, 72.32W.

Stony Hill Road at Brick Kiln Road
This erratic sits approximately1.5 meters above ground level and is located on the western side of Stony Hill Road at it's intersection with Brick Kiln Road in Sag Harbor. Meter stick on left side of image for scale. Scroll down to see other views of this erratic. 40.58N, 72.19W

Stony Hill Road

Sag Harbor