Exploring Earth History The NJ Classroom Field Trip into the Geologic Past

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Exploring Earth History The NJ Classroom
Field Trip into the Geologic Past
Student Name(s) Date TEACHERS
GUIDE http//hurri.kean.edu/dobosiewicz Teacher
Grade
2
Site 1 Route 46W (3 mi east of Route 31
intersection) 40.84130N 74.95132W
Elevation - 490'
Sketch the rock layer
What are the characteristics of this rock?
Color(s)____Gray__________________ Reacts to
Acid _Yes__ Layers? ______Yes______________Is it
all one mineral? _Yes__ Any unusual
features?____dark inclusions / oolites____________
_ reacts when scratched or powdered Describe the
layers Curved, a few feet long segments..stromatol
ites! Tilted vertically How did this rock form
and when? Cambrian Period Shallow, tropical
marine environment favorable for Stromatolites
(cyanobacteria) to form What is this rock (See NJ
Geology Map)? Sedimentary Allentown Dolomite
Close up
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Site 2 Route 46W (3 mi west of Route 31
intersection) left on Water St. 40.83842N
75.05760W Elevation - 400'
Sketch the rock layer
What are the characteristics of this rock?
Color(s)____black/dark gray___________ Reacts
to Acid __yes__ Layers? ___Yes__________________Is
it all one mineral? __yes_ Any unusual
features?_breaks easily, soft, Maybe some
fossils__________________________ Describe the
layers tilted formation, wavy lines How did
this rock form and when? Ordovician Period Deep
marine environmentthe dark coloration is due to
carbon From organisms that die and settle to the
bottom What is this rock (See NJ Geology Map)?
Sedimentary Jacksonburg Limestone
Close up
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Site 3 Route 46W (west of Route 31
intersection) outcrop on right 40.85058N 75.05746W
Elevation - 300'
Sketch the rock layer
What are the characteristics of this rock?
Color(s)____light gray________________ Reacts
to Acid _No___ Layers? ________yes_____________Is
it all one mineral? _No__ Any unusual
features?___curved crstalline lines of
dolomite The rest of the formation is made of
clay size particles_________ Describe the layers
slatey layers but dark colorations are
vertical Sediments deposited horizontally then
tilted vertically How did this rock form and
when? Ordovician Period (but younger than
Jacksonburg Limestone) deep marine
environment What is this rock (See NJ Geology
Map)? Sedimentary Martinsburg Shale
Close up
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Site 4 Delaware Water Gap Stop at Rest Area off
Route 80 40.97198N 75.12283W Elevation - 325'
Sketch the rock layer
?Cross bedding
What are the characteristics of these 2 rocks?
Color(s)___gray/red/black/white______ Reacts to
Acid _No_____ Layers? ____Yes________________Is
it all one mineral? _No____ Any unusual
features?___cross beds, coarse sediments, Bloomsbu
rg Redbeds are found here, eroded from farther
NW Describe the layer layers broken into 1-2
foot size slabs___ Alternating fine and coarse
sediments How did this rock form and when?
Silurian Period Bar deposits from braided streams
and Alluvial fans near an ocean What are these 2
rocks (See NJ Geology Map)? Sedimentary Shawangunk
Formation (sandstone/conglomerate) Bloomburg
Redbeds (siltstone)
Close ups
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Site 5 - East Stroudsburg, PA (exit for
191) 41.02897N 75.20775W Elevation - 550'
Sketch the rock layer
What are the characteristics of this rock?
Color(s)___gray/brown/rusty_________ Reacts to
Acid _No_____ Layers? ______Yes________________Is
it all one mineral? _No__ Any unusual
features?___FOSSIL!!!_(fossils will react to
acid but the rock formation around will not)
Fossils include Horn coral, brachipods,
crinoids, bivalves Describe the layers
vertical and tilted layering How did this rock
form and when? Devonian Period Coral Reef
Environment that was covered by silt and
clay! What is this rock (Not on NJ Geology
Map)? Shale/Siltstone
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Site 6 Route 15N mile 10-11, Park Ride Sparta,
Lake Mohawk Bus.Dist. 41.01737N 74.61874W
Elevation - 1000'
Sketch the rock layer
What are the characteristics of this rock?
Color(s)____mixed dark light_________ Reacts
to Acid _No____ Layers? ____No________________Is
it all one mineral? _No___ Any unusual
features?_very hard, contain many
distinct Minerals (quartz, feldspars,
micas) Describe the layers Mountain formation,
the minerals are Layered or create color bands
How did this rock form and when? PreCambrian
Era 750mya to 1bya (Grenville Orogeny-Appalachian
Mts) Igneous Inclusion that was metamophosed by
plate colliding mountain building What is this
rock (See NJ Geology Map)?Metamorphic/Igneous Look
s a lot like Granite but really is a Gneiss
Close ups
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Site 7 Route 80 - Watchung Mountains
Sketch the rock layer
What are the characteristics of this rock?
Color(s)____dark/rusty_________________ Reacts
to Acid _No_____ Layers? _____No__________________
_Is it all one mineral? _No____ Any unusual
features?__columnar fractures (vertical)__________
_____________________ Describe the layers lava
flow, cooling produced fractures b/c Outside
cools faster How did this rock form and when?
Triassic Period What is this rock (See NJ
Geology Map)? Igneous Watchung Mountain Basalt
Close up