Geologic Maps

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1 As we all know, there are maps of many kinds.  Most of us are familiar with maps that show us location of places, such as the map of the United States.  However, other maps show other things.  A geological map show where rocks and faults are at, as well as their location in an area.  Then the map has various colors to show different information.  It also includes many symbols. The geological map helps us to understand the earth beneath us, so we can understand the world around us better.
2 Notice the colored areas on this map taken from the US Geological Survey website.  Each area is colored to match the type of geological unit (volume of a certain kind of rock of a given age range).  For example, one area might be colored bright orange to show a sandstone of one age while another might be pale brown to show another sandstone of a different age.
3 The geologists name and define the geological units they find.  They determine everything they do based on their findings of rocks and the ages of the rocks.  These continue to change as more investigations are completed.  The science of geology can be quite interesting.

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GRADE:4

Word Lists:

Geologist : an expert in or student of geology

Location : a particular place or position

Area : a region or part of a town, a country, or the world

Unit : an individual thing or person regarded as single and complete but which can also form an individual component of a larger or more complex whole

Geology : the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.

Symbol : a mark or character used as a conventional representation of an object, function, or process, e.g. the letter or letters standing for a chemical element or a character in musical notation

Investigation : the action of investigating something or someone; formal or systematic examination or research

Define : state or describe exactly the nature, scope, or meaning of

Fault : an unattractive or unsatisfactory feature, especially in a piece of work or in a person's character

Match : a contest in which people or teams compete against each other in a particular sport

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Additional Information:

Rating: B Words in the Passage: 211 Unique Words: 114 Sentences: 14
Noun: 69 Conjunction: 13 Adverb: 10 Interjection: 0
Adjective: 15 Pronoun: 15 Verb: 30 Preposition: 26
Letter Count: 934 Sentiment: Positive Tone: Neutral (Slightly Formal) Difficult Words: 40
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