Virtual Landscapes of Texas

12

Table 1. Properties of the environmental geologic units

Composition of substrate

Soil Character-

Topography,

Process

Vegetation

Current land use

istics, A and B

slope

horizon (Solum)

Low-relief, sandy mud— pine forest

Interbedded sand

Sandy loam and

Flat to gently rolling hills 0-3%

Recharge

Dominantly pine

Rangeland, pastureland,

and sandy mud

loamy sand (A);

forest

J3

sandy clay loam

commercial

(B)

timberland

Moderate-relief,

sandy mvd — pine forest

Rolling to steep hills 3-8%

Rangeland, pastureland,

commercial

J4

timberland,

recreational area

Low-relief, sandy mud— prairie

Interbedded sand and mud and

Fine sandy loam

Flat to gently rolling hills 0-3%

Major recharge

Prairie grasses

Cropland, minor aquifer

J5

sandy mud

and clay loam (A); clay and silty clay (B)

and mesquite

(map sheets 1-6); oak forest (map

sheet 7)

Moderate-relief,

sandy mud- prairie J6

Rolling to steep hills 3-6%

Minor recharge

Cropland, pastureland,

minor aquifer

Clay mud

Clayey mud

Clay and clay loa

Flat to gently rolling hills 0-5%

Gulleying

Prairie grasses

Cropland, pastureland

K1

(A); clay (B)

and mesquite

High-relief,

Iron-cemented

Gravel I'ithosols;

Steep with local

Sheetwash

Mixed oak-juniper forest; pine-oak

Rangeland-

iron-cemented

sand and mud

ironstone material

scarps 8-25%

quarried for road

uplands L 1

forest

metal

Rolling ironstone

Interbedded sand

Gravel and sand

Gently to moder-

Recharge

Oak-mesquite

and sand

and iron-cemented

ately rolling hills 3-8%

forest; pine-oak

L 2

sand and mud

forest

Gravel cap

Siliceous gravel

Gravelly sandy

Flat to gently rolling hills 0-5%

Oak forest

Gravel pits

L 3

(chert), probably highly dissected

loam

terrace remnant

gravel lag

Surface-mined/

Variable— mostly

Unreclaimed— no

Reclaimed flat to

Dependent on reclamation use — pasture, oak,

Relcaimed—

reclaimed land M 1 or M 2

sand and mud

soil; reclaimed —

gently rolling; unreclaimed— pits,

pastureland, unreclaimed-

and sandy mud now disturbed

homogenized sub-

strate

etc.

pines

some stock

by mining (M 1)

ponds, generally unused

Low terrace

Same as modified

Same as modified

Same as modified

Low-frequency

Same as modified

Same as modified

Overlay

terrace

terrace

terrace

flooding

terrace

terrace

Flood-prone land

Same as modified

Same as modified

Same as modified

Same as modified

Variable— but

Overlay

unit

unit

unit

unit

influenced by flooding potential