Structural Measurement Atlas
Atlas / Sources / Idaho Geol. Survey

Idaho Geol. Survey

23,888 structural measurements in the Atlas come from Idaho Geol. Survey, harvested across 16 published maps and data releases and reconciled into the Atlas schema.

Show only this source on the map

0% of this source's records state their own azimuth convention in the published data. Where a convention is not stated the Atlas infers it from the source's documented practice and records that it did so — which is why every row keeps a link back to the map it came from, and why a measurement that matters should be checked against that map.

What it contains

Measurement typeGeometryMeasurementsShare
Other Planar — strike and dip 20,82487%
Foliation Planar — strike and dip 2,71611%
Lineation (mineral, stretching) Linear — trend and plunge 3051%
Fault plane Planar — strike and dip 27<1%
Joint Planar — strike and dip 13<1%
Vein / dike Planar — strike and dip 3<1%

Where it is

StateMeasurementsShare
Idaho 23,73899%
Washington 108<1%
Montana 42<1%

Most-measured published maps

Published mapYearScaleMeasurements
DGM-7 North Idaho + SW Idaho compilations + DWM-92 1:100,00017,956
IGS-GMS92-3 1:100,0002,751
IGS-UP-RL2001h2001 1:100,0001,079
T-UCB-JC-19821982 1:100,000593
USGS-PP344-E 1:100,000492
USGS-PP344-B 1:100,000417
USGS-PP344-A 1:100,000201
UP-RK-19901990 1:100,000121
USGS-PP344-D 1:100,00092
USGS-B1608 1:100,00052
IGS-UP-RL20042004 1:100,00039
IGS-TR81-2 1:100,00026
T-UCB-GN-19731973 1:100,00025
GSA-CS19841984 1:100,00024
T-UI-BS-19851985 1:100,00018

Most-measured map units

Map unitAgeLithologyMeasurements
Ywml 1,494
YXsg 1,069
Quartzite and calc-silicate rocks of the Wallace Formation, undivided Yqcw Mesoproterozoicfeldspathic quartzite;calc-silicate gneiss;biotite granofels;schist927
Yb 834
Quartzite of the Ravalli Group Yqrv Mesoproterozoicfeldspathic quartzite;phyllite;schist756
Yr 742
Schist and gneiss Ysg Mesoproterozoicmuscovite-biotite schist;biotite gneiss725
Calc-silicate gneiss Ycg Mesoproterozoiccalc-silicate gneiss;granofels;calc-silicate quartzite;garnet-biotite schist;gneiss637
Yl 612
Ypl 565
Ywu 553
Ysp 506

Other sources