Classification and ID Codes for Glacial Phenomena

Glacial features of the 100, 200 and 300 series are generally vector line objects whose extents are > 1 km wide or long. Smaller features are known in some areas, but have not been entered in this regional datebase. Most (but not all) of these categories are utilized in the current database.

Glacial limits (100 series)

100 Maximum limit pre-Wisconsin glaciation, undifferentiated.
101 App. max limit pre-Wisconsin glaciation, undifferentiated.
102 Pre-Wisconsin ice border, undifferentiated.
103 App. pre-Wisconsin ice border, undifferentiated.

110 Maximum limit early Independence (McCredie) glaciation, in KS & MO.
111 App. max limit early Independence (McCredie) glaciation, in KS & MO.
112 Maximum limit late Independence (McCredie) glaciation, in KS & MO.
113 App. max limit late Independence (McCredie) glaciation, in KS & MO.
114 Independence (McCredie) ice border, undifferentiated, in KS & MO.
115 App. Independence (McCredie) ice border, undifferentiated, in KS & MO.

120 Maximum limit pre-Illinoian glaciation, undifferentiated.
121 App. max pre-Illinoian glaciation, undifferentiated.
122 Pre-Illinoian ice border, undifferentiated.
123 App.pre-Illinoian ice border, undifferentiated.

130 Maximum limit Cedar Bluffs glaciation, in Nebraska.
131 App. max limit Cedar Bluffs glaciation, in Nebraska.
140 Glacial ice border, undifferentiated, age uncertain.
141 App. glacial ice border, undifferentiated, age uncertain.

160 Maximum limit Illinoian glaciation, undifferentiated.
161 App. max limit Illinoian glaciation, undifferentiated.
162 Maximum limit Liman stade Illinoian glaciation, in Illinois.
164 Maximum limit Monican stade Illinoian glaciation, in Illinois.
165 App. max limit Monican stade Illinoian glaciation, in Missouri.
166 Maximum limit Jubileean stade Illinoian glaciation, in Illinois.

190 Maximum limit Wisconsin glaciation, undifferentiated.
191 App. max limit Wisconsin glaciation, undifferentiated.
192 Maximum limit Late Wisconsin glaciation.
193 App. max limit Late Wisconsin glaciation.
194 Maximum limit Early Wisconsin glaciation.
195 App. max limit Early Wisconsin glaciation.
198 Wisconsin ice border, undifferentiated.
199 App. Wisconsin ice border, undifferentiated.

Drainage features (200 series)

200 Melt-water spillway channel.
201 Assumed melt-water spillway channel.
210 Tunnel valley.
211 Assumed tunnel valley.
220 Major buried-valley channel.
222 Preglacial channel beyond ice limit.
230 Proglacial lake.
231 Assumed proglacial lake.
240 Preglacial drainage divide.
241 Assumed preglacial drainage divide.

Glacial landforms/deposits (300 series)

310 Outwash plain.
312 Esker/fan landform.
320 Drumlin/streamlined hill.
330 End moraine.
340 Kames, eskers and/or thrust blocks, undifferentiated.
342 Glaciotectonic structures (buried), undifferentiated.
350 Exposure of pre-Wisconsin deposit within region of Wisconsin glaciation.

Ice movement indicators

Directional point symbols in separate coverage: striation/groove, till fabric, glaciotectonic structure, streamlined landform, etc. Three-digit ID gives compass bearing of feature (pointing in assumed downice direction). These features are not included in the primary database at this time.

For description of a similar GIS database/map--see the Glaciotectonic map of North America. Arc-Info was used for the glaciotectonic project. For the pre-Wisconsin map, Idrisi/Tosca is the primary GIS software.

Pre-Wisconsin homepage

Last update: 20 May 1997