Western Australia 1: 50 000 regolith–landform resources ...
Transcript of Western Australia 1: 50 000 regolith–landform resources ...
I N D I A N
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I N D I A N
O C E A N
dredged to
10 m
PORT GREY
CHAMPION
BAY
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HIGHWAY
GEORGINA
KENNEDY
ROAD
ROAD
ROAD
GOULDS
DEEP
DALE
JANDANOL
MOON
YOON
OOKA
NARN
GULU
ROAD
ARTHUR
ROAD
BRICE
ROAD
EDWARD
ROAD
EDWARD
ROAD
GILE
S
NARRATARRAM
OONYOONOOKA
RUDD
S
GULLY
MAGNET
MOUNT
ROAD
BRAND
HIGHWAY
COMPANY
ROAD
MACA
RTNE
Y
ROAD
RIVER
G R E E N O U G H
F L A T S
GREENOUGH
PHELPS
ROAD
BRAND
Cape Burney
Southgate Dunes
ROAD
Tarcoola Beach
ROAD
ROAD
ROAD
Separation Point
Point Moore
ROAD
ROAD
GERALDTONAIRPORT
GERALDTON
GERALDTONGreenough
GERALDTON
Yard
20
drainGERALDTON
Greenough
Geraldton Racecourse Bore
No 313 Well
No 320 Bore
No 318 Well
No 324 Bore
No 323 Well
No 311 Well
No 312 Well
Greenough Store Well
Convent Well
No 316 Bore
Flour Mill Well
Narngulu
Meru
Narngulu Heavy Mineral SandProcessing Plant
GeraldtonAirport
Narngulu
No 319 Well
No 3315 Bore
No 1 Well
No 314 Bore
AP 2 Bore
GS2A Bore
WR 2 BoreWR 3 Bore
WO 1 Bore
WT 2 BoreWT 1 BoreWR 1 Bore
UR 1 Bore
Woorree Park Bore
GS4 BoreGS3 BoreAlexander Park 2 Bore
UR 2 Bore
WP 1 Bore
HP 1 Bore
GDP3 Bore
GS6 Bore
No 310 OPWN Pit Bore
GS Allanooka No 3 BoreNo 322 Well
GS8 Bore
TOWN TOWERS36 m
SOUTH A58 m
MUSEUM69 m
CITY OF GERALDTONSHIRE OF GREENOUGH
SHIR
E OF
GRE
ENOU
GH
CITY
OF
GERA
LDTO
N
African
Reef
Point
Moore
Reefs
Four Fathom Bank
Outer Knoll
Inner Knoll
Little African Reef
SouthgateSouthgate
Reef
Greenough Reef
Northampton 47 km
Mullew
a 83
km
Dong
ara
39 k
m
CHAPMAN
RIVER
BRAND HIGHWAY
GREENOUGH RIVER Greenough
Geraldton Airport
CHAPMAN RIVER
GERALDTON_MOUNT MAGNET ROAD
Moonyoonooka CHAPMAN RIVER Geraldton Airport
GERALDTON_MOUNT MAGNET ROAD
MoonyoonookaNarngulu
GS7 Bore
GS6 Bore GS7 Bore
Greenough
Moonyoonooka
DEVLINPOOL
I N D I A N
O C E A N
Bootenal
Bootenal
CUTUBURY NATURERESERVE
drain
drain
F L A T S
B A C K
Pages Beach
Greys Beach
Black Beach
Town Beach
Champion Bay
Beach
Moresby
MOUNT SCOTTHILL
MOUNT TARCOOLA
Utakarra RepeaterStation
Una Brook
Narngulu RepeaterStation
Rudds Gully
BootenalSpring
The Convict Bridge
Cape Burney
14
90
37
M²
M²
M²
M¹
M´
Mµ
Mµ
M²
Mµ
Mµ
M´
GaA¢
SpE
SpEk
SpEk
GaA¢
GaA¤
SpEk
SpEk
SpE
SpEk
QuB£
GaA¤
SpE
SpEk
SpEk
SpEkSpE
SpEk
GaA¢QuE2
GaA¢
SpE
SpEk
SpE
SpEk
QuE2
QuE2
QuE3
QuE2
QuE2
GaA¢
SpESpE
SpEº
SpEk
QuE3
SpEk
SpC§
SpC§
M´
GaA¢
SpEk
MoC§
MoA¤
SpE
SpEk
âc
MoC§
M°
M°
M´ Mµ
QuB£
QuB´
QuE2
SpE
SpEk
SpEk
SpE
âc
MoC
GeA¶
GeA¤
GeA¶
Mµ
QuB´
Mµ
M§
M´
Mµ
Mµ
SpE
GaA¶
MoC§
GaA¤
SpE
GaA¢
GaA¶
GaA¶
GaA¢
ìmNO
GeA¤MoC
âc MoCMoC§
MoA¤
M§
âc âc
âc
ìmNO
âc
âc
âc
âcãk
âc
ãk
ãk
MoC
SpC§
M°
14
37
SpEk
MoRf²
MoRf²
GaAº
M´
M´
M´
M´
M´
M´
M´
M´
M´
M´
M°
M²
M´
Sp
M°
MoSp
Ge
MoGa
M´
Qu
M°
M´
Sp
M²
Greenough 1
SpEk
âc
SpE
SpEk
SpE
GaA¢
âc
MoC§
QuE1¢
QuE1¢
QuE1¢
QuE1¢
QuE1¢
QuE1£
QuE1£
QuE1£
QuE1£
QuE1£
QuE1£
QuE1º
SpE
MoRz
âyìmNO ãk
MoC
SpEk
GaA¢
Ga
MoC§
SpEkGa
ãkìmNO
QuE1¢M°
GaA¢ SpC§
M§
Mµ
Mµ
Sp
M¹
MoA¤
Jc
âc
âc
ây
âc
âc
ìmNO
ãk
Geraldton
Fault
52
ìmNO
Ga
Hampton Arms 1
ây
âc
ãk
ìmNO
âd
ìmNO
Sp Ga âc
ìmNO
âc
Ga
St
St
St
SpEãk
Greenough 1St
278400 6805480
NUMBER EASTING NORTHINGCOMMODITY*
4338 CySedimentary_undivided
269300 68173606590 SvUndivided
6593
6590
6591
6592
6598
6599
6600
6602
6603
66046605
6606 66076608
6609
6613
6614
6615
6617
6618
6619
6620
6621
4338
Boyd Street
278420 68163906591 Gvl68157556592 279100Gvl
6593 275150 6815120Sv
280290 68140106598 Gvl279765 68138306599 Gvl
68135806600 280320Sv
Pirone's Sand Supplies
68128906602 280265Gvl68124706603 279560Sv68119506604 279910Sv68116006605 272090Sv
Meru
68116006605 272090Lst271000 68087306606 Sv271000 68087306606 Lst275080 68088106607 Lst
68085556608 268920
Midwest Sand Supplies
Lsd
274620 68085906609 Sv269860 68073006613 Sv271220 68060706614 Gvl273830 68057706615 Sv
68045356617 271915Lst68041706618 274750Lst68030406619 274500Sv
277120 67999406620 Lst67993906621 278030Sv
KEY TO OPERATING STATUS
Bold numbers (i.e. 6592)Bold and italic numbers (i.e. 6609)
Cy
Sv
Gvl
Lst
6596
6680
6681
280270 68148206596 Gvl
269780 68169106680 Lst273170 68028806681 Lst
Operating quarryAbandoned quarry
Numbers refer to GSWA WAMIN mineral occurrence database
INDUSTRIAL MINERAL_Cy, Lsd
CONSTRUCTION MATERIAL_Gvl, Lst, Sv
Lsd
Geraldton Brick
¦ Western Australia 2000
with modifications from geological field survey
This map is also available in digital form
the Information Centre, Department of Minerals and Energy, 100 Plain Street,Published by the Geological Survey of Western Australia. Copies available from
East Perth, WA, 6004. Phone (08) 9222 3459, Fax (08) 9222 3444
The recommended reference for this map is:
GNMN
GRID / MAGNETIC
GRIDCONVERGENCE
True north, grid north and magnetic northare shown diagrammatically for the centre
of the map. Magnetic north is correct for
2 years.2000 and moves easterly by about 0.1^ in
TN
1.1¾
ANGLE 2.3¾
114°30À
28°45À
55À
50À
29°00À
114°30À 35À 40À 114°45À
29°00À
55À
50À
28°45À
114°45À40À35À
SHEET INDEX
REFERENCE
GEOLO
G IC A L SURVEY
WE
ST
E R N A U S T R AL
IA
GEOLOGICAL SURVEY OF
WESTERN AUSTRALIA
DAVID BLIGHT, DIRECTOR
56 58 ä60 62 6457 59 61 63 65 66 67 68 69 71 72 73ä70 74 75 76 77 78 79 ä80
ìî90ô
ôôÜN
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ä57ôôôÜE 58 59 ä60 61 62 63 64 65 66 67 68 69 ä70 71 72 73 74 75 76 77 78 79 ä80ìî90
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SHEET 1840Ý-ݱ±± FIRST EDITION 2000
M§
Mµ
M´
M²
M°
Qu
Ga
Ge
Sp
Mo
Ge
Qu
Holocene Jurassic Triassicundivided
MesozoicCainozoic
Phanerozoic
Pleistocene
Proterozoic
Land System
Age
Description
SYMBOLS
Geological boundary
exposed...........................................................................................................
Fault or shear
exposed...........................................................................................................
Bedding, showing strike and dip
inclined............................................................................................................
Gneissic banding, showing strike and dip
inclined............................................................................................................
Fracture or jointing, showing strike and dip
vertical............................................................................................................
Highway with national route marker...................................................................
Formed road; bridge.............................................................................................
Track.......................................................................................................................
Railway, with siding..............................................................................................
Fence, generally with track..................................................................................
Townsite,
less than 1Ý000.............................................................................
Locality...................................................................................................................
Microwave repeater station..................................................................................
Horizontal control, major......................................................................................
Sand dune.............................................................................................................
Watercourse...........................................................................................................
Bathymetric contour, depth in metres.................................................................
Lake........................................................................................................................
Drain.......................................................................................................................
Dam, tank...............................................................................................................
Lighthouse..............................................................................................................
Wharf, jetty or pier................................................................................................
population more than 10Ý000......................................................................
M¹M§MµM°
M²M¹M´
QuB£QuB´
Eolian. Parabolic dunefield; eolian shell and quartz sand
QuE2 Eolian. Older dunefield; eolian shell and quartz sandQuE3
QuB£
QuB´
QuE2
QuE3
Quindalup ( )
GaA¤GaAºGaA¶GaA¢
GeA¶
GaA¢GaAº
GeA¤
Eolian. Swampy swale; waterloged organic soil over eolian shell and quartz sand
Eolian. Deflated older dunefield; weakly lithified eolian shell and quartz sand
Greenough ( )
GaA¤ GaA¶
GeA¤GeA¶
SpEºSpE Eolian. Deflated dunes of residual quartz sand over calcarenite; low sandy rise in alluvial plain
and flats
Greenough Alluvium( ) Ga
SpSpearwood ( ) SpESpEº SpC§
SpEkSpEkSpC§
Eolian. Calcareous eolianite; calcrete above lithified eolian shell and quartz sandColluvial. Footslope colluvium; decomposed eolian shell and quartz sand
MoMoresby ( ) MoA¤MoA¤
MoC
MoC
Colluvial. Undivided slopes; silty sand over mottled sandy clay
âc
ãk ìmNO
MoC§
MoC¶
MoRf²
MoC§ Colluvial. Footslopes; silty sand over mottled sandy clayMoC¶
Residual. Quartz sand over weathered duricrust and mottled soilMoRf²
âc
ãkìmNO
Bore or well............................................................................................................
Marine
M§ Mµ M° M² M¹ M´
Qu
Ga
Ge
Sp
Mo
Marine reef
Marine nearshoreMarine offshoreMarine channel
0 5 10
Kilometres
SCALE 1:Ý250Ý000
Bore and well data supplied by the Water and Rivers Commission
Geology by R. L. Langford 1998Ê99
Edited by D. Ferdinando and G. Loan
GEOLOGICAL SURVEY OF WESTERN AUSTRALIA
SHEET 1840Ý-ݱ±± FIRST EDITION 2000
Topography from the Department of Land Administration Sheet SH 50-1, 1840,
AB
C
D
EF
SHEET INDEX
W.A.
N.T.
S.A.
N.S.W.
Vic.
Qld
Tas.
A.C.T.
1:100Ý000 maps shown in green
G
H
J
K
Petroleum exploration well
stratigraphic....................................................................................................
GREENOUGH ALLUVIUM SYSTEM_9400 ha 14%
GREENOUGH SYSTEM_400 ha 1%
MORESBY SYSTEM_2800 ha 4%
0 5 10
Kilometres
SCALE 1:Ý250Ý000
Local government area boundary.......................................................................
Mineral and rock commodities
Clay................................................................................................................
Gravel.............................................................................................................
Limestone.......................................................................................................
Sand...............................................................................................................
QuE1¢
QuE1¢
QuE1£
QuE1£
QuE1º
Ferruginous gravel_ MoRf², MoRz
Red and yellow sand_ SpE, SpEº
Limesand_
GaA¤, GeA¤, GaA¶, GeA¶, GaA¢
QuE1º
QUINDALUP SYSTEM_4500 ha 6% (Safety Bay Sand)
Marine. Channel; relict erosional fluvial channel
MoRz
MoRz
Landsat Imagery supplied by Remote Sensing Services, Department of LandAdministration
BLOCK DIAGRAMS
AC
BB
D
F
EE G
K
HHJJ
VH
Vertical exaggeration = 10
Cartography by S. Collopy, J. Kirk, and B. Williams
100 m
SEA LEVEL
SEA LEVEL
100 m
100 m
SEA LEVEL
100 m
SEA LEVEL
SEA LEVEL
500 m
500 m
SEA LEVEL
Made ground or quarry........................................................................................
VH
Vertical exaggeration = 10VH
Vertical exaggeration = 2
22
33 44
55 66
77 88
99 1010
1111 1212
LANGFORD, R.L., 2000, Geraldton, W.A. Sheet 1840Ý-Ý3
Marine. Man-made fill or reclamation; rock rubble and earth fillMarine. Shore face; shell and quartz sand; minor rock platformMarine. Nearshore sand plain and sandy hollows; shell and quartz sand; minor rock ridges
Marine. Offshore sand plain; shell and quartz sand
Coastal. Beach; includes foredune; marine shell and quartz sand; eolian in partCoastal. Beach ridge plain; eolian shell and quartz sand
Eolian. Blowout; actively eroding eolian shell and quartz sand
Alluvial. Swamp; waterlogged organic soil over silty sandy clayAlluvial. Terrace; silty sandy clay
Alluvial. Terrace; silty sandy clay
Eolian. Swampy swale; waterlogged organic soil over residual quartz sand
âd
ây
Colluvial. Talus slope to escarpment; weathered rock debris; gravel and boulders
âd
ây
UNIVERSAL TRANSVERSE MERCATOR PROJECTION
Grid lines indicate 1000 metre interval of the Map Grid Australia Zone 50
VERTICAL DATUM: AUSTRALIAN HEIGHT DATUM
0 1 2 3 4
KilometresMetres
1000
HORIZONTAL DATUM: GEOCENTRIC DATUM OF AUSTRALIA 1994
SCALE 1:50Ý000
500 5
BATHYMETRIC DATUM: LOWEST LOW SEA LEVEL
Alluvial. Alluvial plain; silty sandy clay over sandy gravel
WESTERN AUSTRALIA 1Ý:Ý50Ý000 REGOLITH_LANDFORM RESOURCES SERIES
WESTERN AUSTRALIA 1Ý:Ý50Ý000 REGOLITH_LANDFORM RESOURCES SERIES
M§ ReclamationMµ Marine shore face
M²M°
M¹M´
MARINE_42,500 ha 63%
normal, tick on downthrown side..................................................................
siltstone; carbonaceous in parts
Northampton Complex: granulite and metamorphosed granite
1:50Ý000 maps shown in black
HUMMOCK ISLAND
1740
SNAPPER BANK
±²
HUMMOCK ISLAND
1840 1940
19391839
GERALDTON INDARRA
DONGARA MINGENEW
±
±±
MOUNT LEFROY
HOWATHARRA
GERALDTON
NANSON
WALKAWAY
BOOKARA
DONGARA
MUNGARRA
ERADU
YARDARINO
INDARRA
WONGOONDY
MINGENEW
YUWARANA
±±±
±
±±
±
±±
±
±±
±±±
±²
±±±
±²
±±±
±²
Wave pattern denotes permanent water.............................................................
Date of imagery: 23 August 1992
Normal fault, showing relative displacement
Bathymetric data supplied by the Department of Transport. This map is not intendedfor marine navigation
Photograph 2 reproduced with permission of the Geraldton Port Authority
Western Australia Geological Survey, 1:Ý50Ý000 Regolith_Landform Resources Series
Printed by the Geological Survey of Western Australia
Swale line..............................................................................................................
Contour, height in metres....................................................................................
LEGEND
GERALDTON MINERAL OCCURRENCES
SIMPLIFIED LAND SYSTEMS, SHADED RELIEF,INFRASTRUCTURE, AND DRAINAGE
Quindalup System_beach and dunefields
Greenough Alluvium System_alluvial plain
Greenough System_alluvial terraces and channels
Spearwood System_deflated dunes
Moresby System_plateau and footslopes underlainby Jurassic rocks
Alluvial. Stream channel; includes bed and banks; seasonally water-filled; silty sandy clay
Alluvial. Stream channel; includes bed and banks; usually water-filled; silty sandy clay
Alluvial. Stream channel; includes bed and banks; seasonally active; slope deposits, silty sandyclay, and weathered bedrock
Residual. Ferruginous pisolitic duricrust over mottled soil (weathered bedrock)
LANDSAT TM IMAGE WITH FIELD SITE LOCATIONSPOTENTIAL CONSTRUCTION AND
INDUSTRIAL MINERAL RESOURCES
Limestone_ QuE2, QuE3, SpEk, SpC§, M´
QuB£, QuB´, QuE1¢, QuE1£, Mµ, M°, M¹
Sand, gravel and clay_
QuE1º, MoA¤, MoC, MoC§, MoC¶, M², M¹
Offshore level seabed, and nearshore level to gently inclined seabed, with low, submerged rocky ridges or reefs. Inshore rock platforms (1) and gently inclined shore face. Erosion and deposition by marine tides, currents, and wave action. Small areas of man-made reclamation in urban areas at the coast (2). Dominantly shell and quartz sand formed by biogenic processes, reworking of fluvially sourced material from weathered hinterland rocks, or by erosion of reefs. Reefs or rock flats composed predominantly of eolian calcarenite. Currently active system that includes undivided older reefs probably of the Spearwood System. Primarily used for shipping, fishing industry, and recreation. Possible source of sand or limestone for construction, beach rebuilding, and reclamation. Shallow reefs are a hazard to shipping. Rapid deposition and erosion of coastal deposits can also occur during storms.
Level to very gently inclined terrace (7) with locally steep to cliffed terrace scarps. Formed by fluvial deposition of silty sandy clay (8) from the Chapman River on flood plains and in valleys between the adjacent escarpments. Lateral equivalent of the Greenough Alluvium System downstream to the southwest, and derived from the surrounding Moresby System. Dominantly used for agriculture, with no urban or industrial development. Much of the native vegetation has been cleared, except in river channels. Heavy rainfall can cause local flooding in level, poorly drained areas, and severe channel erosion in the river and streams.
Level plain with locally steep to cliffed terrace slopes (5). Formed by fluvial deposition from the Greenough and Chapman rivers on flood plains between the dunes and inland escarpment. Dominantly red silty sandy clay over sandy gravel (6), interbedded in places with residual sand and calcarenite of the Spearwood System. Rare swamps with waterlogged organic soil. Overlain by the Quindalup System to the west. Interbedded with the Spearwood System. Lateral equivalent of the Greenough System, and partially sourced from the Moresby System to the north and east. Dominantly used for agriculture and horticulture, with some urban and industrial development. Almost all native vegetation has been cleared, except in river channels and poorly drained areas. Major flooding hazard in level, poorly drained areas, with severe erosion of stream channels also possible.
Mostly level to gently inclined dunes, with rare steep to precipitous rocky slopes (9). Dominantly eolian deflated dunes and swales formed by southerly winds and eroded by coastal processes to form a westerly facing scarp. Rare marine facies of biogenic reef near the coast. Forms low sandy rises in the Greenough Alluvium System. Originally calcareous dune sand, now weathered by surface leaching and groundwater precipitation to form yellow (10) and red residual quartz sand over a white to light brown calcrete surface to the underlying calcarenite (limestone). Swampy swales contain waterlogged organic soil. Calcareous slopewash colluvium on the westerly facing footslopes to the scarp is derived from weathered calcarenite. Component of the reefs in offshore areas. Overlain by the Quindalup System to the west. Overlies the Moresby System on the hills to the north and east. Interbedded with the Greenough Alluvium System. Source of construction limestone, building sand, and fill for reclamation. Extensively cleared for cropping and grazing. Areas underlain by limestone are often uncleared. Also used for urban and industrial development. Minor hazard on rocky slopes.
Very gently inclined hillcrests above locally steep to very steep scarps. Moderate to steeply inclined sideslopes and level to gently inclined footslopes (11). Residual quartz sand and ferruginous duricrust over mottled soil (weathered rock) on hillcrests (12). Mass wasting deposits ranging from proximal weathered rock debris, gravel, and boulders, to distal silty sand over mottled sandy clay. Seasonally active fluvial deposition of silty sandy clay on sideslopes and footslopes. Hillcrests and plateaus, locally above a scarp exposing weathered Jurassic sedimentary rocks. Minor exposures of Triassic strata and Proterozoic basement rocks on hillslopes. Overlain locally by the Spearwood System. Source of material for the Greenough and Greenough Alluvium systems to the southwest. Mostly cleared for cropping and grazing, but the steeper sideslopes and some gravelly flat tops are only partially cleared of native vegetation. Source of gravel for road building. Heavy rainfall can cause severe channel erosion in the streams, and landslides on the steeper slopes.
Cemented ferruginous pisolitic duricrust cappings on low hills and escarpments, locally concealed by residual quartz sand. Potential source of aggregate for road construction.
Calcrete and calcarenite (limestone) formed by weathering of carbonate-rich sand dunes. Rock strength varies from moderately weak to very strong, and may be excavated as aggregate or boulders. Overlain by variable thickness of yellow and red sand. Limestone may be used for road base, large-scale fill, harbour installations, and sand for building.
Mostly unlithified shell-rich sand of eolian and marine origin, with calcium carbonate contents up to 94%. May be suitable for agricultural applications.
Quartz-rich eolian sand formed as a weathered residuum over limestone. Potential source of sand for building platforms and construction.
INTERPRETED ONSHORE BEDROCK GEOLOGY
SPEARWOOD SYSTEM_8000 Ha 12% (Tamala Limestone)
Reserve boundary................................................................................................
Building, yard.........................................................................................................
Marine. Reef or rock flat; undivided eolian calcarenite, biogenic reef, and beach rock
The Geraldton Regolith-Landform Resources map provides information on the regolith (soils) and underlying rocks, on the landforms (landscape), topography, infrastructure, and on the mineral and construction material resources of Geraldton. This map will be of value in landuse planning, the sustainable development of resources, and in identifying natural hazards, both onshore and in shallow nearshore areas. The map also delineates land systems, which are areas of discrete recurring patterns of landform, regolith, materials, and vegetation. These patterns are related to geological and hydrogeological units, and form the basis of identifying landuse including mineral resource potential.
Fluvial sediments ranging from silty clay to sandy gravel. Potential source of aggregate-quality sand and gravel for building and fill. Includes clay suitable for brick-making
Mostly colluvial sand, gravel, and clay, with some weathered rock or offshore deep water sand plain
Limesand.......................................................................................................
D
E F
G
H
J
K
A B
C
coal (subsurface only)YARRAGADEE FORMATION: sandstone, siltstone, and claystone with minor conglomerate and
CADDA FORMATION: shale, siltstone, and sandstone with shelly sandy limestone (subsurface only)CATTAMARRA COAL MEASURES: thinly bedded sandstone, gravelly sandstone, and laminated
KOCKATEA SHALE: laminated siltstone and shale with minor sandstone
Mostly gently to moderately inclined dunes, occasionally very steep. Eolian processes dominant, with wave action important for erosion and deposition in the narrow coastal zone. Dunes and swales formed by southerly winds and eroded by coastal processes to form a westerly facing shoreline. Actively eroding to form blowouts in areas of vegetation loss (3). Includes older deflated dunefields composed of weakly lithified calcarenite (4). Small swampy swales contain waterlogged organic soil. Currently active system that overlies the Greenough Alluvium and Spearwood Systems. Landuses include urban and industrial development, and recreation. Crop cultivation and grazing on the older dunes. Source of limesand, limestone, and sand for construction and beach restoration. Used as fill for reclamation. Migrating sand from blowouts is a minor hazard.
DEPARTMENT OF MINERALS
AND ENERGY
L. C. RANFORD, DIRECTOR GENERAL
GOVERNMENT OF WESTERN AUSTRALIA
HON. NORMAN MOORE, M.L.C.
MINISTER FOR MINES
The Map Grid Australia (MGA) is based on the Geocentric Datum of Australia 1994 (GDA94).
GEOCENTRIC DATUM OF AUSTRALIA
GDA94 positions are compatible within one metre of the datum WGS84 positions.
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