-evaulation hazards

-constructing transportation

-selection for public facitilies

-land-use planning & proposals

-regularity decision-making

-development and protection of ground water

-natural assesment, exploration development and management

-earth science research

a map as viewed from above showing the dristribution of different kids and ages of rocks and their structure

CONTAINS

legend-map colors, symbols, age and general description of rock types (old rocks/new rocks)

symbols recording- strike and dip of rock units/folds,faults and orientation

-show variations in the elevation of a land surface

-tightly spaced contour lines described steep changes in elevation

-areas of very few contours portray flat areas

Steep sloop

(smaller circle)

gentle slope

(bigger circle)

V of contour in updip direction

(towards higher elevation)

Ridges

V of contour in downdip direction

(towards lower elevation)

-unaltered solid rock

-divided in rock layers (good for mapping)

(Sedimentary-then deposited as flat lying layers)

any dip,fault or fold came after deposition of flat layers

-where the bedrock is exposed at the surface

(record strikes and dips of outcrops and put them on maps)