Reading the landscape
Modern islands are remnants of a larger complex
Molokaʻi, Lānaʻi, Maui, and Kahoʻolawe are the exposed remnants of several overlapping shields. At its broadest, Maui Nui plausibly formed one much larger landmass before subsidence, erosion, and rising seas opened the channels.
Penguin Bank is included as a seventh candidate system because published interpretations do not agree on whether it is an independent volcano or an extension of West Molokaʻi. The animation preserves that uncertainty instead of resolving it visually.
Ten broad phases
What the animation is showing
These phases organize a continuous history. Their boundaries are evidence windows, not instantaneous changes.
About 2.3–1.84 Ma
Western foundations rise
Penguin Bank, West Molokaʻi, East Molokaʻi, and West Maui begin as independent volcanic systems; their earliest emergent outlines remain broadly inferred.
About 1.84–1.45 Ma
Molokaʻi grows through failure
West and East Molokaʻi mature while the Wailau landslide removes part of East Molokaʻi’s north flank during a broad evidence-bounded interval.
About 1.45–1.20 Ma
Maui Nui reaches its broadest form
Lānaʻi and Kahoʻolawe build between the older shields as West Maui expands; the system plausibly coalesces near its maximum extent.
About 1.20–930 ka
Haleakalā builds the east
East Maui rises rapidly while Kahoʻolawe wanes. Haleakalā’s Kula and Hāna histories are treated as a continuous postshield sequence.
About 930–600 ka
Subsidence opens the first divides
Erosion, reef growth, tilting, and subsidence lower the saddles until high sea level can divide a landmass that had long functioned as one.
About 600–320 ka
Sea level reconnects and separates
Glacial lowstands expose shallow saddles and interglacial seas flood them again while West Maui and Kalaupapa eruptions locally resurface older landscapes.
About 320–125 ka
Fragmentation becomes persistent
Repeated highstands deepen the pattern of separate islands, and the Maui–Kahoʻolawe split becomes persistent in the legacy reconstruction.
About 125–18 ka
The last great lowstand
Near the last glacial maximum, sea level falls about 120 meters and may reconnect parts of Maui Nui one final time.
18 ka–present
Rising seas reveal the modern islands
Postglacial sea-level rise floods the remaining saddles as the reconstruction converges on modern measured relief.
Present
Maui Nui today
Molokaʻi, Lānaʻi, Maui, and Kahoʻolawe remain above water while Penguin Bank and the connecting saddles lie submerged.
Scientific transparency
What is measured, inferred, and illustrated
The production register keeps those categories separate.
Evidence-constrained
Modern relief and bathymetry, mapped volcano identities and geology, radiometric ages, reef terraces, and documented flank-failure systems.
Scientifically inferred
Emergence windows, ancient land area, overlap timing, subsidence, saddle exposure, and each edifice's contribution to the shared surface.
Illustrative
Exact prehistoric coastlines, lava paths, erosion channels, surface texture, vegetation, and interpolation between anchor states.
How it was built
Seven surfaces, one declared composition rule
Each candidate edifice has a stable ID and independent age-keyed surface. At every frame, the exposed system is composed from the highest surface above the declared sea-level scenario.
Thirteen checkpoint ages, three topology scenarios, five motion tests, fixed texture fields, and a NOAA ETOPO modern endpoint constrain the production. The research packet preserves unresolved chronology and source limitations.
Read the animation transcript
About 2.3–1.84 Ma
Western foundations rise
Penguin Bank, West Molokaʻi, East Molokaʻi, and West Maui begin as independent volcanic systems; their earliest emergent outlines remain broadly inferred.
About 1.84–1.45 Ma
Molokaʻi grows through failure
West and East Molokaʻi mature while the Wailau landslide removes part of East Molokaʻi’s north flank during a broad evidence-bounded interval.
About 1.45–1.20 Ma
Maui Nui reaches its broadest form
Lānaʻi and Kahoʻolawe build between the older shields as West Maui expands; the system plausibly coalesces near its maximum extent.
About 1.20–930 ka
Haleakalā builds the east
East Maui rises rapidly while Kahoʻolawe wanes. Haleakalā’s Kula and Hāna histories are treated as a continuous postshield sequence.
About 930–600 ka
Subsidence opens the first divides
Erosion, reef growth, tilting, and subsidence lower the saddles until high sea level can divide a landmass that had long functioned as one.
About 600–320 ka
Sea level reconnects and separates
Glacial lowstands expose shallow saddles and interglacial seas flood them again while West Maui and Kalaupapa eruptions locally resurface older landscapes.
About 320–125 ka
Fragmentation becomes persistent
Repeated highstands deepen the pattern of separate islands, and the Maui–Kahoʻolawe split becomes persistent in the legacy reconstruction.
About 125–18 ka
The last great lowstand
Near the last glacial maximum, sea level falls about 120 meters and may reconnect parts of Maui Nui one final time.
18 ka–present
Rising seas reveal the modern islands
Postglacial sea-level rise floods the remaining saddles as the reconstruction converges on modern measured relief.
Present
Maui Nui today
Molokaʻi, Lānaʻi, Maui, and Kahoʻolawe remain above water while Penguin Bank and the connecting saddles lie submerged.
Research foundation
Principal scientific sources
The production packet retains the complete source register, extracted constraints, datasets, open questions, and anchor decisions.
Price, J.P., and Elliott-Fisk, D.L. (2004)
Topographic History of the Maui Nui Complex, HawaiʻiPacific Science 58Sherrod, D.R., Sinton, J.M., Watkins, S.E., and Brunt, K.M. (2021)
Geologic Map of the State of HawaiʻiU.S. Geological Survey Scientific Investigations Map 3143Clague, D.A., and Sherrod, D.R. (2014)
Growth and Degradation of Hawaiian VolcanoesU.S. Geological Survey Professional Paper 1801Sherrod, D.R., Nishimitsu, Y., and Tagami, T. (2003)
Geologic evidence against rejuvenated-stage volcanism at HaleakalāGeological Society of America Bulletin 115Xu, G., et al. (2014)
Mantle heterogeneity from Molokaʻi and Penguin BankGeochimica et Cosmochimica Acta 132Clague, D.A., and Moore, J.G. (2002)
The proximal part of the giant submarine Wailau landslideJournal of Volcanology and Geothermal Research 113Faichney, I.D.E., et al. (2009)
Submerged reefs in the Maui Nui ComplexMarine Geology 265NOAA National Centers for Environmental Information (2022)
ETOPO 2022 15 Arc-Second Global Relief ModelGlobal topography and bathymetry dataset