Geology of the Sonoran Desert Flashcards Preview

Desert Museum Docent > Geology of the Sonoran Desert > Flashcards

Flashcards in Geology of the Sonoran Desert Deck (26)
Loading flashcards...
1

Earth's surface is covered by about a dozen major 'plates'.

 

True or False

True

2

The Sonoran Desert lies in a geologic region called the B______ and R______ province.

Basin and Range

3

Topography is an important influence upon the unique climate of the Sonoran Desert since topographic barriers direct, confine or block ____ masses and the moisture they contain.

Air

4

The Sonoran Desert is considered a major earthquake area.

 

True or False

False

5

The main skyline of the Tucson Mountains visible from the Desert Museum is the remains of a volcano.

 

True or False

True

6

Looking to the south and west of the Museum, the first two basins (valleys) are called the A____ Valley and the A_____ Valley.

Avra and Altar

7

The major mountain ranges in the southwest view from the Desert Museum are the B__________ Mountains, home to the Tohono O'odham Creator, and the C_______ Mountains, which block the view of the Q________ Mountains, home to Kitt Peak National Observatory.

Baboquivarie

Coyote

Quinlin

8

Looking north from the Desert Museum, across Kings Canyon from the Ancient Arizona Exhibit, the red hills are called the __________ Redbeds, and they are at least _____ million years old.

Recreation Redbeds

150 million years old

9

Put these geological events in order, from oldest (1) to most recent (4).

___ The Basin and Range formed as the region stretched and brittle crust cracked along steeep fault lines. The formation of the Tucson Basin occured.

___ The region was stretched apart in a great "taffy pull". Layers of still-warm and ductile crust slid past each other.

___ The region was squeezed and folded, creating a high plateau, higher than the current-day Catalina Mountains. Large, violent volcanoes erupted (10 to 100 times more violent that Mt. Saint Helens) which helped to create the backbone of what eventually became the Rocky Mountains, an closer to home, the Tucson Mountains.

___ Erosion from the Tucson Mountains and Catalina Mountains filled the Tucson basin.

3 -- The Basin and Range formed as the region stretched and brittle crust cracked along steeep fault lines. The formation of the Tucson Basin occured.

2 -- The region was stretched apart in a great "taffy pull". Layers of still-warm and ductile crust slid past each other.

1 -- The region was squeezed and folded, creating a high plateau, higher than the current-day Catalina Mountains. Large, violent volcanoes erupted (10 to 100 times more violent that Mt. Saint Helens) which helped to create the backbone of what eventually became the Rocky Mountains, an closer to home, the Tucson Mountains.

4 -- Erosion from the Tucson Mountains and Catalina Mountains filled the Tucson basin.

10

Two minerals that are colorless in their pure form and acquire their color from other impurities or structural imperfections in the specimen are:

 

Calcite and quartz

11

Which mineral is used in toothpaste?

Flourite

12

Which mineral is commonly misidentified as gold?

Pyrite

13

Which mineral in our kit has a distinct smell?

Sulfur

14

Two minerals that are the principal copper ore minerals mined in southern Arizona are:

 

a. Chalcocite and malachite

b. Chrysocolla and malachite

c. Chalcocite and chrysocolla

d. Sulfur and gold

c. Chalcocite and chrysocolla

15

A mineral is a aturally occuring solid substance with a definite chemical composition that has formed by geologic processes. Which of the follow is a mineral?

 

Sugar

Salt

Salt

16

A rick is an aggregate of one or more ________.

minerals

17

Much of the Tucson Mountains is composed of a compacted, solidified volcanic ash called t____.

tuff

18

The minerals in the large rocks on the front patio are chrysocolla with azurite and malachite.

 

True or False

True

19

On the grounds, an example of caliche can be found outside of the c____.

cave

20

Two minerals that have been used for paint pigments are azurite and malachite.

 

True or False

True

21

Copper minerals are among the most colorful.

 

True or False

True

22

Copper played an important role in the history and development of Arizona.

 

True or False

True

23

Check the physical properties that help identify a mineral.

___ Color

___ Hardness

___ Size

___ Cleavage

___ Density or Specific Gravity

___ Luster

___ Crystal Habit

___ Beauty

___ Taste

___ Magnetism

___ Smell

___ Streak

X Color

X Hardness

___ Size

X Cleavage

X Density or Specific Gravity

X Luster

X Crystal Habit

___ Beauty

X Taste

X Magnetism

X Smell

X Streak

24

In which rock type are caves most likely to form?

Limestone

25

Carbonic acid (which is carbon dioxide dissolved in water) is the principal acid responsible for cave formation. This is the same substance that gives carbonated drinks their fizz.

 

True or False

True

26

Without water, cave formations stop growing.

 

True or False

True