Naming and establishing or modifying formal units

Question 1

Formal Unit

Answer 1

Named in accordance with an established scheme of classification. The initial letter of the rank or unit term must be capitalized.

Question 2

Informal unit

Answer 2

Not defined in accordance with an established scheme of classification. However, often used for economic or scientific purposes

Question 3

Proper name of a geological unit

Answer 3

It is a compound name. A geographic name combined with an appropriate rank or descriptive term. Use of impermanent features should be avoided

Question 4

Stratotype (also called type locality or type section

Answer 4

A stratotype is the standard (original or subsequently designated) for a named geologic unit and constitutes the basis for definition or recognition of that unit or boundary

Question 5

Boundary stratotype

Answer 5

The upper and lower limits of a unit stratotype are designated points in a specific sequence or lacality and serve as the standards for definition and recognition of a stratigraphic units boundaries

Question 6

Type locality

Answer 6

Is the specified geographic locality where the stratotype of a formal unit or unit boundary was originally defined and named

Question 7

Composite Stratotype

Answer 7

Consists of several reference sections required to demonstrate the range or totality of a stratigraphic unit

Question 8

Reference sections

Answer 8

May serve as invaluable standards in definitions or revisions of formal geologic units. It may designated for thous units whose stratotypes are made inaccessible

Question 9

Stratotype descriptions must include both ____ and ______

Answer 9

Geographic information - maps, aerial photos, acces and coordinates

Geologic info - thickness, strutures, etc