The Venus Geologic
Mappers' Handbook

Appendix F: Technical Reviewer's Checklist for Planetary Geologic Maps

Map Title:_____________________________________________________________________



Date sent to reviewer:_____________Date returned to USGS map coordinator:_______________

(A) Geologic map

_____ If checked here, color each unit of uncolored map ozalid.

Check for the following:

_____ (1) Completeness of contacts

_____ (2) Correctness of map-unit symbols (compare with DOMU)

_____ (3) Consistency of line symbols (dashed where gradational or approximate, dotted where buried, or queried where uncertain). Structure symbols have thicker lines than contacts

_____ (4) Agreement of triple junctions of contacts with stratigraphy shown in correlation chart

_____ (5) Correct coloring of author-supplied copy

_____ (6) Consistency of detail throughout map (unless image resolution changes dramatically); map is neither overly cluttered with symbols and unnecessary line work nor overgeneralized. (If more detail is required in an especially complex area, an inset map at larger scale may be included.)

_____ (7) Geographic nomenclature is correctly shown and adequate

_____ (8) Reasonable match of borders with borders of previously submitted maps at same scale (contacts, structure, relative ages). If author of later map cannot match, he/she should explain in DOMU.

(B) Description of map units (DOMU)

_____ (1) Unit names and symbols follow precedents, where applicable

_____ (2) Units are mappable based on described characteristics

_____ (3) Important stratigraphic relations are noted

_____ (4) Location noted if occurrence restricted

_____ (5) Interpretation clearly separated from description; description contains no genetic terms; interpretation(s) consistent with unit description

_____ (6) If type area is noted, it is the most definitive exposure

_____ (7) Unit groupings have precedent or are clearly defined

_____ (8) Format follows USGS guidelines (see VGM Handbook, Appendix D)

(C) Correlation chart

_____ (1) Relative ages of units agree with stratigraphic information in DOMU and crater-count data (if applicable)

_____ (2) Format follows USGS guidelines (see VGM Handbook, Appendix D)

(D) Explanation of map symbols

_____ (1) Symbols are clearly defined, distinct, and agree with precedents where applicable

(E) Map text

_____ (1) Discussions are based mainly on map data; all appropriate references are cited (involved analyses should be presented in a journal article)

_____ (2) Good balance in presentation of interpretations (not overly biased or extensive)

_____ (3) Previous work referenced; significant departures in mapping from same data are discussed

_____ (4) Text agrees with other components of map; not overly redundant with DOMU

_____ (5) Introductory material is useful. It generally includes brief discussions of the geologic and physiographic settings, data sources, and previous work

_____ (6) Where geology is complex, special sections and (or) summary are provided

_____ (7) Location of each feature refrred to is clear on map or a figure or is given verbally in text

(F) Cross sections (if applicable)

_____ (1) Topographic profile drawn accurately on stable material (such as mylar)

_____ (2) Consistent with stratigraphy and structure shown on map and correlation chart and described in text

_____ (3) Line(s) of section and vertical exaggeration (if any) chosen to best show the structure

(G) Figures and tables

_____ (1) New, map-based numerical data presented in tables and (or) graphs (e.g., crater counts, remote-sensing data for map units)

In addition to completing this checklist, please annotate map materials with your comments. Lengthier comments should be typed separately. Please return all materials originally received (including route sheet signed by reviewer or initialed if reviewer requires a second look at the map) for the review to:

Ken Tanaka

PGM Coordinator


2255 N. Gemini Dr.

Flagstaff, AZ 86001

If you need assistance in using this checklist, please call Ken Tanaka at (928) 556-7208; FAX (928) 556-7014; E-mail

Mappers' Handbook
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Planetary Geologic Mapping
USGS Astrogeology Research Program NASA