TIMOR SEA

BEAGLE GULF

SHOAL BAY

ADAM BAY

HOPE

PORT DARWIN

FANNIE BAY

Lead

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HOWARD SPRINGSNATURE PARK

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Railw

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Darwin

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East Arm

DARWIN

SOUTH WESTVERNON ISLAND

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HowardSprings

Palmerston

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RobertsonBarracks

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KoolpinyahStation

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Strangways Road

Girraween Rd

Pioneer Drive

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ChannelIsland

CrocodileFarm

Mandorah

BerrySprings

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131°00'

131°00'

92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

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91 000mE6 7 7 7 7 7

7 7 7 7 7

12°45'130°45'

50'10' 131°15'

12°45'

40'

30'

20'

10'

131°15'12°05'

10'12°05'

50'

10'

20'

30'

40'

8 590

8 610

8 620

8 6008 600

8 610

8 620

308 6308 6

408 6408 6

508 6508 6

608 6608 6

55'05'

55'05'

35'

25'

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15'

25'

35'

130°45

9100

0mE

8 5

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EM1

EM2EM3

EM4

EM5

EM6

EM7

EM8

EM9

EM10

EM11

EM12

EM13

EM14

EM15

EM16

EM17

EM18

EM19

EM20EM21

EM22

EM23

EM24EM25EM26

EM27EM28

EM29

EM30

EM31

EM32

EM33

EM34

EM35

EM36

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EM38

EM39

EM40

EM41

EM42

EM43

EM44

EM45

EM46 EM47

EM48

EM49

EM50EM51

EM52

EM53

EM54EM55

EM56

EM57

EM58

EM60

EM61 EM62

EM63

EM64

EM65

EM66

EM67

EM68

EM69

EM70EM71

EM72

EM73

EM74

EM75EM76

EM77

EM78

EM79

EM80

EM81

EM82

EM83

EM84

EM85

EM86

EM87

EM88

EM89

Boral 7Boral 8

Boral1 to 6

EM87

QU

AT

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NA

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TE

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RA

SS

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RO

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SCALE 1:100 000

River and creek alluvium: gravel, sand, silt

Quartz feldspar biotite gneiss, quartzite

Mudflats: clay, mud, silt

Kaolinitic to montmorillonitic claystone/mudstone

NORTHERN TERRITORYAUSTRALIA 1:100 000 GEOLOGICAL SPECIAL

Cheniers: beach sand ridges, sand, shelly sand, coralline sand

Beachrock: sand, shell fragments and limonite pisoliths in calcareous cement

Slope wash, sandy flood plains, gravel, sand, silt, colluvium

Sand, silt, transported laterite gravel and intact duricrust

Laterite gravel (pisolitic and nodular); duricrust/ferricrete

Claystone, radiolaria-rich, glauconitic sandstone, bioturbated beds, silicified claystone, clayey sand, basal conglomerate

Siltstone, shale and phyllite, quartz veins, coarse quartz sandstone, quartz arenite, arkose, quartz pebble conglomerate

Siltstone, shale, chert, sillicified carbonate, white quartz, oolitic quartzite

Siltstone and shale, colour-banded and pyritic at depth

LITHOSTRATIGRAPHIC LEGEND

EXTRACTIVE GEOLOGY OF THE OUTER DARWIN AREA

FIRST EDITION 2001

PART SHEETS 5072, 5073, 5172, 5173

EXTRACTIVE GEOLOGYOF THE OUTER DARWIN AREA

01 1 2 3 4 5 6 7 8 9 10 kilometres

PART SHEETS 5072, 5073, 5172, 5173

WangarluFormation

DarwinFormation

PetrelFormation

WildmanSiltstone

Acacia GapQuartziteMember

KoolpinyahDolomite

Pink orthoquartzite and sandstone, commonly ripple-marked

Vein quartz

UNIVERSAL TRANSVERSE MERCATOR PROJECTION, ZONE 52GEOCENTRIC DATUM OF AUSTRALIA 1994 (GDA94)

MAP GRID OF AUSTRALIA 1994 (MGA94)

Oc NORTHERN TERRITORY GOVERNMENT, 2001

Qca

Qaf

Qcr

Qcb

Qcl

Qa

Qc

Kuw

L

Kld

Jkp

PtdL

PwtL

PfbL

LPs

PpwL

PpaL

PpkL

DepotCreekSandstone

BurrellCreekFormation

SouthAlligatorGroup

WelltreeMetamor-phics

Geological boundary

Drill hole

Trend line

GEOLOGY

Hard rock quarry

Coarse sand quarry

Porcellanite quarry

Claypit

Gravel scrape

Fine sand scrapes

EXTRACTIVE SITES

MAP LOCALITY

DARWIN

ALICE SPRINGS

NORTHERNTERRITORY

INDEX TO ADJOINING MAPS130°00'

11°30' 11°30'132°00'

12°30'

Mataram5274

Bynoe5072

Noonamah5172

Mary River5272

Reynolds River5071

Batchelor5171

McKinlay River5271

Fish Reef4973

Koolpinyah5173

Point Stuart5273

Darwin5073

Bathurst Island4974

Melville5074

Conder5174

Anson4971

Fog Bay4972

13°30'132°00'

13°30'130°00'

12°30'

131°00'

131°00'

GRID ZONE DESIGNATION:

SAMPLE POINT:

UNIVERSAL GRID REFERENCE

100 000 METRESQUARE IDENTIFICATION

TO GIVE A STANDARD REFERENCE ONTHIS SHEET TO NEAREST 100 METRES52L

IGNORE the SMALLER figures of any grid number; these are for finding the full co-ordinates. Use ONLY the LARGER figures of the grid number; example:

1 Read letters identifying 100 000 metre square in which the point lies:2 Locate first VERTICAL grid line to LEFT of point and read LARGE figures labelling the line either in the top or bottom margin, or on the line itself:3 Estimate tenths from grid line to point:4 Locate first HORIZONTAL grid line BELOW point and read LARGE figures labelling the line either in the left or right margin, or on the line itself:5 Estimate tenths from grid line to point:

If reporting beyond 18° in any direction,prefix Grid Zone Designation, eg:

GMFM

GLFL

8 600007

916 000

GM

253

101

GM253101

52LGM253101

SAMPLE REFERENCE:

STUART-ARNHEM HWY JUNCTION

The Northern Territory Government does not warrant this map as definitive, nor free from error and does not accept liability for loss caused by or arising from reliance upon information provided herein.

Produced by the Northern Territory Geological Survey, Cartographic Unit, Department of Business, Industry, and Resource Development, Darwin, Australia. Issued under the authority of the Minister for Business, Industry, and Resource Development, the Honourable PAUL HENDERSON, MLA.

Base map compiled by NTGS from digital topogaphic data supplied by the National Mapping Division, Geoscience Australia, Department of Industry, Tourism and Resources.

This map is accompanied by a text publication: Doyle N, 2001. Extractive minerals

It is recommended that this map be referred to as: Doyle N, 2001. Extractive geology of the outer Darwin area, 1:100 000 geological map special . Northern Territory Geological Survey, Darwin.

DIGITAL DATA: Map data is stored in MicroStation DGN format. Map information can be obtained from NTGS as hardcopy and/or digital files. Information on formats and release conditions are available from NTGS Sales Counter, 3rd floor Centerpoint

Geology: 2001 NJ Doyle using 1997 air photo (1:20 000) interpretation

Cartography: 2001 RM Jong, RC Poole, RP Ocampo

NorthernTerritory

GovernmentDepartment of Business,Industry and Resource

Development

NorthernTerritoryGeologicalSurvey

R Dennis Gee, Director, Northern Territory Geological Survey

TOPOGRAPHY

Highway

Secondary road

Minor road

Fence

Railway

Intertidal flat

Building

Coastal alluvium: mud, silt, clay

Friable quartz sandstone, quartz pebble sandstone, quartz pebble conglomerate, ferruginous sandstone

Fine to medium quartzite, pyritic interbedded phyllite

Building, Smith Street Mall, Darwin. Phone (08) 8999 6443.Web site: http://www.dbird.nt.gov.au/ntgs/index.html

1:100 000 map sheets have a 4-digit number. The DarwinSD 52-4 1:250 000 map sheet is indicated with heavier outline.

DARWIN SD 52-4

within the outer Darwin area. Northern Territory Geological Survey, Report 14.

1:50 000

River, watercourse