identify the rock formation
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Transcribed Image Text:Local Geology
Figure 4 is a generalized geologic map of the New York region that shows the distribution of different rock and
sediment types that underlies the area. You have been provided with samples of these rocks and sediments. Figure 5,
on the next page, is a more detailed map of Manhattan and the Bronx. It shows the geology of these parts of New
York City more accurately than can be depicted on the generalized geologic map in Figure 4.
The locations where the rock samples were collected are indicated by circled numbers in the more detailed maps of
Figure 2 (samples 8-12); and Figure 5 (samples 1-7). The rocks of samples 6 and 7 occur just to the east and to the
west of the Palisades and were collected from both places.
Generalized
Geologic Map
of the
New York City
Region
Modern Beach and
Dune Sands
Outwash Plain
Sediments
Terminal Moraine
(Tun)
1 mile
122
لا
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
FIGURE 4. Generalized geologic map of New York City. Surface rock types are indicated
by patterns given in the legend for the figure.
Transcribed Image Text:MILES
SAMPLE
1
60
FIGURE 5. Geologic map of Manhattan, the Bronx, and the Palisades of New Jersey. Formations
are indicated by the patterns given in the legend. A "formation' is an area of similar bedrock.
2
Examine samples I through 7, and the geological maps in figures 4 and 5. These maps will allow you to
determine the names of each sample. On the table below, identify the rock formation from which each
sample was collected, and indicate whether the sample is a sedimentary (S), igneous (1), or metamorphic (M)
rock.
S, I, M
3
4
5
6
7
New Jersey "Redbeds"
Palisades Formation
Manhattan Formation
Inwood Formation
Fordham Formation
Sample Location
The Geology of Manhattan, the Bronx,
and adjacent New Jersey
SPECIFIC ROCK IDENTITY
123
Expert Solution
Step 1
| SAMPLE | SPECIFIV ROCK IDENTITY | S, I, M |
| 1 | Gneiss | Metamorphic rock |
| 2 | Marble or Dolomite | Metamorphic rock |
| 3 | Schist | Metamorphic rock |
| 4 | Basalt | Igneous rock |
| 5 | Gabbro | Igneous rock |
| 6 | Sandstone | Sedimentary rock |
| 7 | Shale | Sedimentary rock |
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