Show:
Fossils
Karst Topography
Relative Dating
Terms
Potpourri
100
remains or traces of ancient life preserved in the Earth's crust
What is a fossil
100
type of landscape formed by the dissolution of soluble rocks
What is Karst Topography
100
the science of determining the order of past events
What is relative dating
100
happens when the last of a biological species has died
What is extinction
100
type of rock that fossils are most likely to be found
What is sedimentary rock
200
shows the activity of an organism like footprints
What is a trace fossil
200
most caves in SE Minnesota formed by this, carving out hollows underground
What is acidic water
200
principle that states: younger rocks lie above older rocks
What is Principle of Superposition
200
an impression (empty space) in a rock left by an ancient organism
What is a mold
200
water beneath the Earth's surface that supplies springs and wells
What is groundwater
300
a fossil of an organism that lived in a very short time period, in many locations
What is an index fossil
300
kind of a rock that is predominant in Karst regions
What is limestone
300
principle that states pieces of one kind of rock inside another layer will be older then the rock it is embedded in
What is Principle of Inclusion
300
S.E. Minnesota is called this because the last ice age never came through this area
What is Driftless
300
kind of weathering that occurs when acidic water dissolves rocks
What is chemical weathering
400
contains part of an organism like teeth, bones, or tree trunks
What is a body fossil
400
name 3 features that form in Karst regions
What are sinkholes, springs, caves, and disappearing streams
400
rocks that are crossed by a fault or an intrusion are older then the faults or intrusions
What is Principle of Cross-Cutting
400
the fossils found in S.E. Minnesota prove that this area was once this...
What is a shallow sea
400
molds filled in with sediments or mineral deposits make a copy called this
What is a cast
500
all the fossils that have existed throughout Earth's history are part of
What is a fossil record
500
name the 3 types of rocks that dissolved and formed Minnesota Karst Topography
What is limestone, dolomite, and gypsum
500
sediments are deposited first in flat layers
What is Principle of Horizonality
500
fossils form in S.E. Minnesota because they became stuck in these
What are rocks
500
fossiled carbon outline of an organism
What is carbon film