Name: ____________________________________ Date: __________________ Period: ______
Chapter 15.2: Landforms Created by Glaciers
1. Glacial Erosion
a. The process that formed the ________________ begins with a glacier
still _________ in the valley.
i. As a glacier ________________ its way through a narrow
____________, it breaks off rock from the valley __________,
causing the walls to become __________________.
ii. _______________ of rock are also pulled from the __________
of the upper valley.
iii. A _______________ is a bowled shape ___________________
created by these ________________ actions.
1. Cirque means “___________” in French, as it refers to
the circus like ___________ depression of a circus
theater.
iv. _____________ means spine in French, and refers to the
____________ and jagged ____________ that form between
the cirques.
v. A _____________ is a cluster of several _____________ that
form a ___________________ like peak.
b. When a ________________ moves down a valley it picks up many
________________ ranging in size from _____________ to boulders.
i. These ____________ that are now being ____________ by the
glacier act as another ________________ agent.
ii. As the _________________ and rocks pass over the _________
they _______________ and round larger rock _____________.
1. These rounded _____________________ have a smooth,
gently ________________ side facing the direction from
which the ______________ came, with the far side being
______________ and jagged as rock was pulled away
when the _________ passed over.
2. These rocks are called _____________ _____________,
which means “_____________ _____________” in
French, because they _____________ the backs of sheep.
c. The shape of valleys are originally a “___” shape. However, once a
glacier _______________ through them, it cuts them out to a “____”
shape. This is an easy way for ________________ to tell if the valley
was __________________ by a glacier.
Name: ____________________________________ Date: __________________ Period: ______
d. A __________________ glacier is a glacier that flows into a
________________ glacier.
i. Tributary _________________ do not cut as deep “U” _______
since they are much _________________ than the main glacier,
and when the ______ melts they are left _______ in the valley.
ii. These _______________ formed from the ______________ ice
of a tributary glacier are called __________________ _______.
e. The ________________ process of _________________ ice sheets is
very different from __________________ glaciers.
i. Continental ice _____________ generally level ____________
and produce ____________, rounded ____________________.
1. _____________________ valleys are _______________
out and deepened, and rock surfaces are _____________
and grooved by rocks carried at the ____________ of the
ice sheet. These scratches and grooves run ___________
to the direction of __________________ movement.
Name: ____________________________________ Date: __________________ Period: ______
2. Glacial Deposition
a. Glacial __________________ occurs when valley _______________
reach lower __________________ or when climate change melts
continental _________ _________________.
b. Glacial _________ is the general term given to all _______________
deposited by a glacier or by the __________________ from a glacier.
i. When the glacier _________ all of the _______________ in the
glacier is deposited onto the __________.
ii. _______________ are large boulders that have been _________
by the glacier and do not ___________ the composition of the
______________________ that they are now on.
iii. ________ is made of unsorted _____________ of rock material
that is deposited from __________________ scraped off by the
_________ of the glacier or is left behind when glacial ice
________________.
iv. _________________ drift is material that has been sorted and
deposited in ____________ by streams flowing from the
____________________.
c. ______ deposits are _________________ made from glacial till called
_____________________.
i. Moraines are _____________ of unsorted __________ material
on the ground or on the _____________. We will be discussing
__________ types of till ____________________ or moraines.
1. A ___________________ moraine is one that is
deposited along the ________ of a valley glacier, usually
as a long _______________.
2. A _____________________ moraine occurs when two or
more valley glaciers ______________, and their adjacent
_________________ moraines combine.
3. ____________________ moraine is the _____________
material left ___________________ the glacier when the
ice melts.
a. Much of the _______________ in Ohio is covered
with ground _______________________.
4. ___________________ are long, low, tear-___________
mounds of till, often found in ___________________.
5. A ________________________ moraine is the till that is
deposited at the ________________ or front of a melting
Name: ____________________________________ Date: __________________ Period: ______
_______________. They are belts of small ___________
of till with many ______________________ that contain
lakes or ponds.
6. In front of a terminal _________________, and after
meltwater has ____________________ its small rock
_________________ is a large ________________ plain.
a. An outwash plain is a _____________ of stratified
drift, which usually lies in ________ of a terminal
moraine and is crossed by many meltwater
________________.
7. A _____________ forms when a portion of glacial ice is
_____________ in drift, and when the ice ____________
it leaves a _____________ in the drift, and often forms
____________________.
a. Kettles are mostly found in _____________ plains.
8. An _______________ is formed when ______________
ice sheets ____________ and long, winding ridges of
________________ and coarse sand may be left behind.
a. Eskers ________________ of stratified drift
deposited by streams of meltwater _____________
in ice _________________ within the glaciers, and
may extend for tens of kilometers.
Name: ____________________________________ Date: __________________ Period: ______
3. Glacial Lakes
a. ____________ commonly form lake ___________ by eroding out
surface _______, leaving depressions in the ____________________,
and deepening existing ___________________.
b. Glaciers also commonly form ___________ basins by depositing
_______. Many __________ basins were created by the uneven
surfaces of ground __________________ deposited by glaciers.
c. Another way _______________ form lakes is when ______________
and _________________ moraines block existing ________________
and create a lake _______________.
d. The _____________ ______________ are the result of a combination
of __________________ and ____________________ by continental
ice ____________.
i. Glacial ____________ widened and deepened broad ________
valleys covered by ice sheet.
ii. ________________ to the south blocked off the ends of these
_________________.
iii. As the _____ sheets melted, the ___________________ flowed
into the __________________ and was trapped by the moraines
to form the _______________ Lakes.
1. During the early stages of the ice ___________ the great
lakes were much ____________ and drained to the
_____________. As the _______ __________ retreated,
the lakes became _____________ and the drainage patter
changed. ________________ of the land, and further ice
retreat, _______________ the Great Lakes to their
present ________ and established current ____________
northeast through the St. Lawrence River.
e. In areas where ___________________ is high and _______________
is low lakes with high ___________ content can be formed.
i. In the area where the ice age _________ __________________
once was is the current, and much smaller _________ _______
in Utah.
ii. This lake became very ___________ due to the fact that it had
no _________________, and the only way water could leave
was through _________________. When the water evaporated,
the ________ was left behind forming the current Salt Lake.
Name: ____________________________________ Date: __________________ Period: ______
iii. These high salt ______________ lakes can also be a location of
valuable ______________ depending on the dissolved minerals
it ____________________.
1. Minerals can either be ________________ in by streams
or are the result from the ____________________ and
____________________ processes occurring in the lake.
iv. The salt _________________ left in the dry _________ of
ancient salt lakes often contain valuable minerals such as
_______________, which is used as a _____________ material
and in the manufacturing of __________ and ____________.
1. Currently the dry lake beds of the __________________
___________________ in California contain borax.