facies b

facies b

APHRODITE TERRA

LLORONA 

PLANITIA

NIOBE PLANITIA

ATALANTA PLANITIA

Topographic Arch

SOGOLON

PLANITIA

RUSALKA

PLANITIA Thetis Regio

Ovda 

Regio

st

st

st

st

st

st

st

st

st st

st

st

st

st

st

st

st

st

st

st

st

st

st

st

st

st

st

fcA fC fcR ibGH st st

rtGH lL

fcB fcS fcI fu

co cf cu

unit st

facies a

facies a

facies a

unit lL

unit st

unit lL

unit st

unit lL

unit lL

st

fu

fu

fu

fu

fcA

fcA

fC

fC

fcS

fcS

fcS

fcI

fcI

fcI

fcI

fcI

fcI

fcR

fcR

fcR

fcR

fcR

fcR

fcB

fcB

fcB

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

ibGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

cu

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

rtGH

lL

lL

lL

lL

lL

lL lL

lL

lL

lL

lL

lL

lL

lL

lL

lL

lL

lL

co

cf

cu

ibGH

rtGH

ibGH

ibGH

ibGH

ibGH

rtGH

lL

lL

rtGH co

co

co

co

co

cf

cf

cf

cf cf

cu

cu

cu

cu

cu

cf

cf

cu

cu

cu

cu

cu

cu

cu

cu cu

cu

cu

cu

cu

cf

cu

cu

cu

cu

Maria Celeste

Kollwitz

Greenaway

Bourke-White

Ban Zhao

Olena

Ogulbek

Budevska

Jutta

Vigée-Lebrun

Escoda

Callirhoe

LLORONA PLANITIA

Kamadhenu Corona

Barbale Dorsa

Wilder

Himiko

Afua

Neeltje

Němcová

Aimee

Phyllis

Tinyl

Hwangcini

Abundia

Corona

Lumo Dorsa

Blai

Corona

Kubebe

Corona

Rosmerta

Corona

Nintu

Corona Gegute Tessera

Snotra Tesserae

Haasttse-baad Tessera

APHRODITE TERRA

Kinsei

Ikhwezi

Ikhwezi

Vallis

Vallis

Vallis

SCALE 1:5 198 991 (1 mm = 5.199 km) AT 0° LATITUDE

1:4 711 886 AT 25° LATITUDE

MERCATOR PROJECTION

500

25°

15°

0°

5°

10°

20°

400 300 200 100 0 KILOMETERS 100 200 300 400 500

120° 125° 130° 135° 140° 145° 150°

120° 125° 130° 135° 140° 145° 150°

25°

20°

15°

10°

5°

0°

25°

20°

15°

10°

5°

0°

Prepared on behalf of the Planetary Geology and Geophysics 

Program, Solar System Exploration Division, Office of Space 

Science, National Aeronautics and Space Administration

Edited by Jan L. Zigler

Cartography by Darlene A. Ryan

Manuscript approved for publication August 14, 2009

Descriptions of nomenclature used on map are listed at 

http://planetarynames.wr.usgs.gov/

Prepared for the

National Aeronautics and Space Administration

U.S. Department of the Interior

U.S. Geological Survey

Printed on recycled paper

Any use of trade, product, or firm names in this publication is for 

descriptive purposes only and does not imply endorsement by the U.S. 

Government

For sale by U.S. Geological Survey, Information Services, Box 25286, 

Federal Center, Denver, CO 80225, 1–888–ASK–USGS

Available at http://pubs.usgs.gov/sim/3089

Geologic Map of the Greenaway Quadrangle (V–24), Venus

By

Nicholas P. Lang1 and Vicki L. Hansen1

2010

75°

50°

25°

75°

25°

–25°

0°

50°

0°

0° 30° 60° 90° 120° 150° 180°

–25°

–50° –50°

–75° –75°

V–1

V–23 V–24 V–22

V–34

V–62

V–35

V–21

V–20

V–9

V–8

V–10

V–33 V–36

V–12

V–45 V–48

V–11

V–46 V–47

V–57

V–3

V–2

V–13

V–44 V–49

V–25

V–32 V–37

V–4

V–56 V–58

QUADRANGLE LOCATION

Photomosaic showing location of map area. An outline of 

1:5,000,000-scale quadrangles is provided for reference. 1Department of Geological Sciences, University of Minnesota Duluth, Duluth, MN

Upper bound of the unit cannot be further 

constrained temporally. Unit may be older or 

younger than implied or formation of this unit 

may have occurred over a longer period than 

implied

Implies that units A and B are in contact, 

but that their temporal relations to one 

another is ultimately unconstrained; it is 

possible that the units are synchronous in 

their emplacement. This applies also where 

units overlap on the SOMU, for example, 

where units st and fcA overlap

Implies that where in contact, unit D is 

younger than unit C

Implies that unit F is younger than unit 

E, but the possibility that units E and F

temporally overlap cannot be excluded

Implies that where in contact, 

unit I is younger than units G

and H. However, where not 

in contact, the temporal 

relation of unit I with respect 

to units G and H is unclear

Lower bound of the unit cannot be 

further constrained temporally. 

Unit may be older or younger than 

implied or formation may have 

occurred over a longer period than 

implied

Cautionary notes:

1. Units st and fu are stratigraphically discontinuous and cannot 

be used for more than local stratigraphic correlations.

2. The horizontal spacing between unit boxes only implies that 

the temporal relation between units is indeterminable.

3. The tops or bottoms of unit boxes at the same vertical position 

on the chart does not imply that the units were emplaced, 

formed, or stopped forming at the same time.

4. The vertical extent of unit boxes is only meant to imply that 

the unit was formed or emplaced at any period of time 

represented by the box.

A B

D

C

G

F

E

I

H

SEQUENCE OF MAP UNITS

TERRAIN AND FLOW MATERIAL KEY

0 100 KILOMETERS

0 10 KILOMETERS

Figure 3. Inverted SAR images showing the intricate contact relation between shield 

terrain (unit st) and the Llorona Planitia lineated terrain (unit lL) in Greenaway quadrangle 

(V–24), Venus. Shields and shield deposits (unit st) coalesce to form a discontinuous layer 

that variably covers, or floods, unit lL, marked by extremely closely-spaced lineaments 

(fractures). As unit st variably covers unit lL, we map the boundary between the two units 

as gradational (thick black dashed line in A). Further, we separate unit lL into two facies 

based on the degree of flooding by unit st: extensively flooded (facies a) and lightly 

flooded (facies b). Similar to the boundary between units st and lL, the boundary between 

the two facies is also gradational (thin white dashed line in A) and may reflect slight 

topographic undulations within unit lL. Enlargements B and C show specific examples of 

the flooding relations: locally isolated shield deposits are completely surrounded by older 

lineated terrain (contacts,thin dashed black lines); shield deposits fill topographic lows 

created by fractures. Arrows mark the locations of some shields.

Figure 2. Images showing ancillary Magellan data sets for Greenaway 

quadrangle. A, reflectivity showing efficiency of surface materials in 

reflecting electron radiation; B, emissivity of surface materials; C, root 

mean square (rms) slope.

11.8°

8.8°

10.3°

140.2° 142.1° 144°

A

A

B

C

C

B

B C

95.6° 120° 150° 180°

45°

–10.7°

0°

25°

Figure 1. Image showing regional setting and topography in Mercator projection for Greenaway 

quadrangle (V–24), Venus. The north edge of Thetis Regio forms the south edge of the map area, 

and the topographic arch divides the northern three-fourths of the map area into two northeasttrending topographic basins. MPR, Mean Planetary Radius (6051.84 km). Topographic base from 

U.S. Geological Survey (http://astrogeology.usgs.gov/Projects/webgis).

Topography (km)

–1.0

–2.9

0.0 (MPR)

11.6

5.0

1.3

1.1

0.9

0.7

0.6

0.5

0.3

0.2

0.2000 6.4000 9.5000 12.6000 3.3000

25°

0°

25°

0°

25°

0°

120° 150°

0.0050 0.5150 0.7700 1.0250 0.5200

0.2793 0.6353 0.8133 0.9913 0.4573

Figure 4. Inverted SAR images illustrating structures that characterize tessera terrain 

within Greenaway quadrangle (V–24), Venus. Structures shown in A and in enlargements 

B and C include a northeast-trending penetrative (at image resolution) fabric; northwesttrending ribbons (wavelengths 2.5 km); northwest-trending parallel folds (wavelengths 

~15–20 km); two suites of lineaments (one suite has northwest and northeast trends with 

wavelenths of <1 km and a second suite has northwest trends with wavelengths of ~1 km 

and parallel the long wavelength folds); ridges and troughs associated with basin and dome 

terrain (C); and northwest-trending late graben (wavelengths ~15–20 km) interpreted as 

associated with Rosmerta Corona. Symbols are included only to highlight structural trends 

and do not reflect structure density. Arrows highlight graben associated with Rosmerta 

Corona.

EXPLANATION

Background fabric (at image resolution)

Tessera lineament a (penetrative at image resolution)

Ribbon structure

Fold crest

Tessera lineament b (wider spacing than Tessera lineament a)

Trough (basin and dome terrain)

0 50 KILOMETERS

0 10 KILOMETERS

7°

3°

5°

120° 122° 124°

A

B C

C

B

DESCRIPTION OF MAP UNITS

TERRAIN AND FLOW MATERIAL

Shield terrain—Low-backscatter, smooth to hummocky material consisting of approximately 1- to 2-km-diameter edifices that do not define any discernable pattern and do 

not appear associated with larger volcanic features. Some edifices contain summit pit 

craters. Adjacent edifices commonly coalesce and have indistinguishable contacts 

with surrounding material(s). Typically lies in gradational contact with surrounding 

map units. Interpretation: Small volcanic edifices and associated deposits forming a 

thin layer locally obscuring the underlying geology

Flow material, undivided—Low-backscatter to very low backscatter, texturally homogeneous to weakly reticulate material with internal discontinuous flow fronts, crater 

halos, and few volcanic structures, including scattered shields and channels. Locally 

deformed by wrinkle ridges and lineaments. Has a gradational contact with unit st to 

the west and is differentiated from shield terrain based on a lower density of shields 

than unit st. Interpretation: Composite unit of presumably volcanic flow material 

from unidentified sources and various deposits associated with impact craters. 

Unlikely that it represents a continuous stratigraphic unit across the map area. Cannot 

be used for correlation across the map area and adjoining quadrangles (see also 

Young and Hansen, 2003)

Abundia Corona flow material—Moderate-backscatter, lobate flow unit(s) that is 

locally covered by small shields and hosts Aimee crater. Interpretation: Lava flow(s) 

sourced from Abundia Corona

Flow material near Corpman Crater—Low-backscatter, topographically smooth material; locally covered by small shields. Interpretation: Volcanic flow(s) sourced northeast of Corpman crater in Rusalka Planitia quadrangle (V–25) and correlated with 

unit fC of Young and Hansen (2003)

Flow material near Snotra Tessera—Moderate-backscatter, lobate flow unit(s) containing a high-backscatter patch (lat ~24° N., long 131° E.). Locally covered by small 

shields. The eastern boundary ponds against units rtGH and lL at Snotra Tessera. 

Interpretation: Lava flow(s) possibly sourced from Boann Corona in Vellamo Planitia quadrangle (V–12) to the north. Postdates formation of the topographic arch. The 

high-backscatter exposure at lat 24° N., long 131° E. may represent either a separate 

flow or a facies change within a single flow

Ituana Corona flow material—Moderate-backscatter lobate flow unit(s) downslope 

from Ituana Corona in Rusalka Planitia quadrangle (V–25) to the east. Flow fronts 

are obscured by halo associated with the Bourke-White impact structure. Locally 

covered by small shields. Flow fronts at lat ~24° N., long ~149° E. pond against unit 

lL. Interpretation: Lava flows sourced from Ituana Corona in V–25 correlate with 

unit fcIt of Young and Hansen (2003)

Rosmerta Corona flow material—Moderate-backscatter material with local high- and 

low-backscatter patches. Several distinct lobate flow fronts. Flows may extend more 

than 1,000 km and flood much of the southwestern portion of unit rtGH within the 

map area. Locally covered by small shields. Interpretation: Lava flows sourced from 

Rosmerta Corona correlate with unit fcR of Bleamaster and Hansen (2005)

Blai Corona flow material—Moderate-backscatter digitate flow unit(s) surrounded by 

unit rtGH. Locally covered by small shields. Interpretation: Lava flow(s) sourced 

from Blai Corona on the V–24/V–36 boundary floods topographic lows and ribbon 

structures in unit rtGH

Gegute and Haasttse-baad Tessera

Intratessera basin material of Gegute and Haasttse-baad Tessera Terrain—Lowbackscatter, topographically smooth material located in topographic basins in unit 

rtGH. Hosts numerous small shields. Interpretation: Low viscosity, gently emplaced 

lava-flow material sourced from small shields in topographic basins associated with 

unit rtGH formation 

Tessera terrain of Gegute and Haasttse-baad Tesserae—High-backscatter material 

composed of inliers along the west and south borders of the map area and several 

kipukas located across the map area. Segments of unit rtGH along the west (Gegute 

Tessera) and south (Haasttse-baad Tessera) margins of the map area have 

topographic expressions as much as a kilometer or more above surrounding materials, whereas kipuka of unit rtGH have topographic expressions extending to only 

several hundred meters above surrounding materials. Characterized by multiple 

suites of tectonic structures with multiple wavelengths. Nearly orthogonal northwestand northeast-trending ribbon structures occur across the Gegute and Haasttse-baad 

Tesserae inliers, as well as numerous kipukas. North-trending folds occur locally 

within the Gegute Tessera inliers and within the western and eastern regions of 

Haasttse-baad Tessera. Basin and dome terrain (Hansen and Willis, 1998) occurs 

within central Haasttse-baad Tessera. Gegute and Haasttse-baad Tesserae host 

several intratessera basins. Interpretation: Unknown material(s) subsequently 

deformed by a single or multiple tectonic events 

Llorona Planitia lineated terrain—High-backscatter material with very low local relief. 

Contains extremely tightly spaced lineaments (<<1 km) with dominant northwest 

trends. Nature of lineaments vary locally from fractures to folds. Typically embayed 

by and locally covered by small shields resulting in a gradational contact with 

younger units; gradational contact may range from tens to hundreds of kilometers. 

Differentiated from tessera terrain by the presence of only one structural trend and 

the very low topographic expression. Interpretation: Material(s) that has undergone 

at least one episode of deformation in Llorona Planitia

CRATER MATERIAL

Crater flow material—Undifferentiated, low-backscatter, channeled material apparently 

flowing from some impact basins. Interpretation: Impact melt or fluidized ejecta 

created by bolide impact

Crater fill material—Undifferentiated, low-backscatter material filling some impact 

basins. Interpretation: Gently emplaced material postdating impacts are possibly 

magmatic in origin

Crater material, undivided—Undifferentiated, high-backscatter material that forms 

crater rims and ejecta blankets. Interpretation: Proximal ejecta and structurally 

uplifted breccia associated with bolide impact

MAP EXPLANATION

SURFICIAL DEPOSIT

Crater-associated ejecta halo—Dark halo associated with some impact structures

PRIMARY STRUCTURES

Contact—Solid where certain; dashed where approximately located

Gradational contact

Radar brightness boundary—Solid where certain; dashed where approximately located

Shield edifice

Dome—Queried where possibly volcanic in origin. Not drawn to scale

Flow boundary—Hachures point towards flow. Solid where certain; dashed where 

approximately located

Flow direction—Dashed where uncertain

Kinsei Vallis—Barbs point toward channel

Channel—Channel edges are not visible at map scale

Central peak of impact crater

Raised rim of large impact crater

Pit of impact crater floor

Pit-crater chain

SECONDARY (TECTONIC) STRUCTURES

Background fabric—Fabric is penetrative at image resolution

Zone of rifting—Not all graben are mapped

Normal fault—Ball and bar on downthrown block. Solid where certain; dashed where 

approximately located

Fracture—Ball denotes graben. Solid where certain; dashed where approximately 

located; dotted where buried

Structural trough—Associated with basin and dome terrain located within tessera terrain

Steep-sided, rectangular structural trough—Typically associated with tessera terrain

Ribbon structure—Solid where certain; dashed where approximately located

Regional lineament

Tessera lineament a—Lineament spacing typically <<1 km. Nature of lineament is 

unconstrained. Solid where certain; dashed where approximately located

Tessera lineament b—Lineament has a wider spacing than tessera lineament a. Nature of 

lineament is unconstrained. Solid where certain; dashed where approximately 

located

Lineament (possibly fracture) associated with unit lL—Solid where certain; dashed 

where approximately located

Ridge associated with unit lL

Broad ridge crest associated with coronae—Solid where certain; dashed where approximately located

Narrow ridge crest—Not assoicated with coronae; has greater relief than a wrinkle ridge

Wrinkle ridge

Fold axis—Solid where certain; dashed where approximately located

AREA OF

MAP

Scientific Investigations Map 3089

Atlas of Venus: Greenaway Quadrangle (V–24)

Pamphlet accompanies map

CRATER MATERIAL