National Park Service Geologic Map of National Park of American Samoa U.S. Department of the Interior Geologic Resources Inventory American Samoa Natural Resource Stewardship and Science Tutuila
Location Map
Vai‘ava Strait Pola Island
E United States National Natural
N I mainland 420ft L Landmark
E P A C I F I C O C 128m N O R T H T E A N A
D
L Hawaii A
N
O
I
T
A
N Pt R Ptp
E
T plug
N
I
Equator
! Ppe Cape Matätula
! Craggy
Täfeu
! SAMOA Cove Point # ! Ra Vatia Bay y Onenoa ! ISLANDS A' ! a Ppe B Pm ! ! ay ! o B Ra Tula Fiji ! ! Vatia ! n u Ppe Easter o Ra fa Australia Island Amalau f ase Tahiti Ä Ppe M Valley Sa‘ilele ! Tonga Pt ! Ra ! S O U T H P A C I F I C O C E A N Äfono Pol ! Pm Masefau M a augalo Ridg ! Pt New Zealand e ‘Aoa 006 Ra Pt Ra Ra Faga‘itua National Park Visitor Center Ra Ra ! Pa ! Ra Äfono Pass ! 001 ! Pt Rainmaker Mountain ! PAGO PAGO ! Aüa ! Faga‘itua ‘Au‘asi ! National Natural Ra ! HARBOR Ra ! Landmark (bay) Ra Ämouli ! Pago Pago Ppt ! ! ! Utulei Ppt North Pioa ! Fagasä 005 Fagatogo ! 001
Ra Mountain Älega Rat ! (bay) ! 1718ft ! ! Ppi ‘Aunu‘u ‘AUNU‘U
! 523m ! Ra # Ppt Ra ISLAND
!
! ! Fagasä 001 # ! ! ! Massacre Ra
Bay Ra Faga‘alu ! ! ! ! ! ! ‘Aunu‘u Island ! # ! Ra Pt Breakers Point
Ra National Natural ! Fatumafuti ! !
! Ra ! K Landmark Matafao Peak N
Fagamalo ! B A Mäloatä ! National Natural ! Ra Fatu Rock A
! U
! ! Ppe Landmark (Flower Pot Rock) N Bay
! Matafao Peak Ra F A Ä
2142ft N !
Ra A‘oloaufou Ppi 653m
#
1340ft
Ra 408m
! This map displays geologic map data compiled by the National Park Service Geologic Resources Inventory.
! !
! ! Ra 001 It is not a substitute for site-specific investigations.
Po
Pt Ra Source Map
Wingert, Everett A. (compiler); J.M. Pereira, (prefacer). 1981. A coastal zone management atlas of American Samoa: Page
Poloa Rll Nu‘uuli
Ppe 13, Western Tutuila Geology (scale 1:24,000). Bulletin Volume 55. Geological Society of America, Boulder, Colorado.
!
!
Rlc Täfuna K
N Wingert, Everett A. (compiler); J.M. Pereira, (prefacer). 1981. A coastal zone management atlas of American Samoa: Page
A
Coconut Pala B 14, Geology: Central Tutuila (scale 1:24,000). Bulletin Volume 55. Geological Society of America, Boulder, Colorado. Point Ä ! ! ‘Ämanave ! Lagoon M plug ! Ä E Ra ! T ! landfill Wingert, Everett A. (compiler); J.M. Pereira, (prefacer). 1981. A coastal zone management atlas of American Samoa: Page Cape Taputapu Pago Pago Ra 15, Geology: Eastern Tutuila (scale 1:24,000). Bulletin Volume 55. Geological Society of America, Boulder, Colorado. National Natural Rlc International Airport ! Landmark ! ! Rll Source Scale 1:24,000 ! Ra Ra Star According to US National Map accuracy standards, features are within 12 m (40 ft) of their true location. Ra Po Mound Pava‘ia‘i site 001 Poster Layout: Dylan Rolley and Georgia Hybels (Colorado State University) Poster Date: September 2018
A Leone All Geologic Resources Inventory geologic map data and publications are available at http://go.nps.gov/gripubs Rla 001 ‘Ili‘ili NPS Boundary Linear Dikes Geologic Units Taputapu Volcanics Rll Fütiga dike, known or certain Fogama‘a Crater Vaitogi land ll Landfill Po Taputapu Volcanics (Pleistocene? and Pliocene) Rlt National Natural Geologic Contacts Vailoatai Landmark Infrastructure plug Plug (Recent) Pago Volcanic Series Turtle and Shark Legend site point of interest known or certain Ppe Ra Calcareous sand, talus and alluvium (Recent) Extra-caldera volcanics (Pleistocene? and Pliocene) Le‘ala Shoreline city approximate National Natural Larsen Leone Volcanics Ppi Intra-caldera volcanics (Pleistocene? and Pliocene) Landmark Bay Fagatele Bay roads map boundary Rll Pahoehoe flow (Recent) National Marine Ppt Lithic-vitric tuff (Pleistocene? and Pliocene) Sanctuary Volcanic Point Features water or shoreline, approximate Rlc Cinder cone at upper end of source fissure (Recent) Alosau Volcanics North 0 1 2 Kilometers # plug Faults Pa Alofau Volcanics (Pleistocene? and Pliocene) Steps Rla Stony ash cone along fissure (Recent) Point 0 1 2 Miles ! outcrop of vitric tuff or cinders normal fault, known or certain Olomoana Volcanics Rlt Lithic-vitric tuff (Recent) Pol Volcanic Line Features normal fault, approximate Olomoana Volcanics (Pleistocene? and Pliocene) Aunu’u Tuff caldera boundary, inferred Masefau Dike Complex normal fault, inferred Rat Lithic vitric tuff (Recent) Pm Masefau Dike Complex (Pleistocene? and Pliocene) Geologic Cross Section Line unknown offset/displacement, Trachyte deposits A-A’ inferred Pt Plugs and dikes (Pleistocene? and Pliocene)
Ptp Pumice deposits (Pleistocene? and Pliocene)