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INTRODUCTION

ZOOMED
MAP

ANNOTATED
MAP


SYMBOLS &
ABBREVIATIONS

C - CREEP EVIDENCE

 

Codes and abbreviations used on map

 

C1  -  strongly pronounced fault creep

 

C2  -  distinct and certain creep evidence

 

C3  -  inconclusive evidence for creep

 

C?  -  additional uncertainty in tectonic origin

 

 

aa - alinement array

 

cb - concentration of cracks in above-grade structure

 

cc - concentration of cracks in concrete slab

 

cp - concentration of pavement cracks

 

cr - clockwise rotation of sidewalk

 

cs - curb separating from sidewalk or pavement

 

cw - clockwise rotation of wall

 

ec - en echelon left-stepping cracks in pavement

 

jo - opening of joints or cracks in concrete

 

pp - multiple patches in pavement

 

pu - compressional pop-up or buckle in concrete

 

ra - right-laterally offset aqueduct, water pipe, or tunnel

 

rb - distortion of above-grade structure (including separating additions and stairways)

 

rc - right-laterally offset curb or form line or railing

 

rf - right-laterally offset fence line

 

rp - right-laterally offset painted line

 

rr - right-laterally offset railroad tracks or guardrail

 

rs - right-laterally offset sidewalk

 

rt - right-laterally offset line of trees

 

rw - right-laterally offset wall

 

so - surveyed offset feature

 

u -  unspecified evidence

 

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         DRAFT MAP IN PROGRESS
              Comments to Jim Lienkaemper (jlienk@usgs.gov)

              (Last updated April 7, 2006)