HOLOCENE
ORGANIC DEPOSITS:  Peat and organic-rich silt and clay.  Includes alluvium
along smaller streams.  In places includes small bodies of water.

ALLUVIUM:  Stratified sand and organic-rich silt and clay.  Mapped only along
the Rum River.


PLEISTOCENE - LATE WISCONSINAN
Grantsburg Sublobe Deposits
LACUSTRINE DEPOSITS - COARSE:  Fine sand and silt; in places underlain by
Grantsburg sublobe sand and gravel.  The upper part of this unit has been
locally reworked by wind. 

LACUSTRINE DEPOSITS - FINE:  Silt and clay deposited in Lake Grantsburg.  This
unit is thicker in low-lying areas and is commonly thin in upland areas where it
mantles Superior lobe deposits.

MANTLED COLLAPSED OUTWASH:  Interbedded sand and pebbly sand with collapsed
bedding, mantled by a variable thickness of undifferentiated Grantsburg sublobe
deposits.

COLLAPSED OUTWASH:  Interbedded sand and pebbly sand, with collapsed bedding.

ICE-CONTACT STRATIFIED DEPOSITS:  Interbedded sand, pebbly sand, silty sand,
and till (Dt unit).

LAKE-MODIFIED TILL:  Loam to clay loam diamicton, yellowish brown (10 YR) to
olive brown (2.5 Y), calcareous.  Locally mixed with underlying reddish-colored
Superior lobe depostits.  The surface of this unit has been modified by Lake
Grantsburg and, in places, is mantled by silt and clay (Dlf unit).

TILL:  Loam to clay loam diamicton, yellowish brown (10 YR) to olive brown
(2.5 Y), calcareous.  Locally mixed with underlying reddish-colored Superior
lobe deposits.  In places is mantled by fine sand and silt (Dlc unit).

Superior Lobe Deposits
MANTLED OUTWASH:  Interbedded sand, pebbly sand, sandy pebble gravel, and silt;
locally cobbly.  Mantled by undifferentiated Grantsburg sublobe deposits,
which are locally quite thick.

MANTLED OUTWASH:  Interbedded sand, pebbly sand, sandy pebble gravel, and silt;
locally cobbly.  Mantled by silt and clay (Dlf unit).

MANTLED ICE-CONTACT STRATIFIED DEPOSITS:  Interbedded sand; pebbly sand;
sandy pebble gravel, locally cobbly; and till (St unit).  Mantled by a
variable thickness of undifferentiated Grantsburg sublobe deposits.

MANTLED ICE-CONTACT STRATIFIED DEPOSITS:  Interbedded sand; pebbly sand;
sandy pebble gravel, locally cobbly; and till (St unit).  Mantled by silt
and clay (Dlf unit).

ICE-CONTACT STRATIFIED DEPOSITS:  Interbedded sand; pebbly sand; and sandy
pebble gravel, locally cobbly; and till (St unit).

MANTLED TILL:  Sandy loam to silt loam diamicton, reddish brown (5 YR) to
dark brown (7.5 YR).  Mantled by silt and clay (Dlf unit).

TILL:  Sandy loam to silt loam diamicton, reddish brown (5 YR) to dark brown
(7.5 YR).  Stone content is quite variable.


