Use the given quadrangle map and other included figures to answer the following

Question

Use the given quadrangle map and other included figures to answer the following questions:

Quadrangle Map - Riverhead, NY [img]https://i.imgur.com/RuJFE4F.jpg[/img]

(A) There is an area that forms a hummocky (bumpy) ridge. What is the orientation or bearing of this ridge?

(B) What is the highest elevation on this map and where did you find it (northern, central or southern area)?

(C) What coastal feature does Hampton beach in the southern part of the map represent? How did it form?

(D) What glacial feature does the area between Bard Hiil and Eastport represent?

(E) What is the topographic gradient in vertical feet/mile from Bald Hill to Eastport?

STATE REPRESENTED BY NEW YORK NEW YORK SUFFOLK COUNTY RIVERHEAD QUADRANGLE DEPARTMENT OF THE INTERIOR U.S.GEOLOGICAL SURVEY TAT AND SURVEYO 181 SLAND SOUND - L()N G Bay ed Ceda L Oakvitle pona tantuel peonk P. O CE A N A T L A N T1 C Geographer in charge. Tontrgra pny byorelineby ing Coatand Gaodeti Scale eaoo ition of Nov. 1904e. reprinted 1923 USCS sorcaFlMAY 22 193 3650 urvey, and J Whitman Topographic Divisfon URVEYEDIN 1903 IN COOPERATION WITH Contour interval 20teet. Datm a mean dea leve RIVERHEAD A

Explanation / Answer

A) The orientation of the Hummocky ridge is East-West direction

B) The highest elevation in the area is 302 feet and is located in the Western part of the region (Bald Hill)

C) The coastal feature in the southern coast is the barrier islands. These islands are formed when waves carved out sediments from the shallow water and deposited in form of linear ridges. When these ridges appear above the water level, they are known as barrier islands.

D) The Bald Hill is a part of a drumlin field and Eastport is part of the terminal moraine.

E) By the given scale, the distance between Bald Point and East port is 4 miles. The elevation change is (302-18) is 284 feet. Hence gradient is 284 feet/4 miles= 71 feet/ mile

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