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Record W2052471724 · doi:10.1144/qjegh.34.1.65

Ice wedges of the Dalton Highway, Alaska

2001· article· en· W2052471724 on OpenAlexaboutno aff
Tony Waltham, P. G. Fookes

Bibliographic record

VenueQuarterly Journal of Engineering Geology and Hydrogeology · 2001
Typearticle
Languageen
FieldEarth and Planetary Sciences
TopicClimate change and permafrost
Canadian institutionsnot available
Fundersnot available
KeywordsGeologyGeotechnical engineering

Abstract

fetched live from OpenAlex

North America’s largest oilfield was discovered in 1968 at Prudhoe Bay; it contained over ten billion barrels of recoverable oil about 3000 m beneath the Arctic Coastal Plain. Its development changed Alaska’s economy for ever, and included building the oil pipeline from Prudhoe Bay to Valdez. The haul road alongside the pipeline is still the only road across northern Alaska, and was named the Dalton Highway when it was opened to public access. It crosses the wilderness of the Brooks Range (⇓Fig. 1), and allows completion of a north–south traverse of Alaska, across a broad range of geology and geomorphology; it was the destination for a Geologists’ Association field trip in 1999, when these notes were compiled. Fig. 1. A truck on the Dalton Highway across soliflucted slopes north of the Atigun Pass over the Brooks Range. The two great mountain ranges of Alaska, the Alaska Range in the south and the Brooks Range in the north (⇓Fig. 2), are accumulations of accreted terranes on the convergent plate margins of the Pacific and Arctic Oceans respectively, and both developed major icecaps during the Pleistocene; large glaciers are still fed by Pacific-derived rainfalls on the Alaska Range, but there is none today on the drier Brooks. The intervening Yukon valley and the Arctic Coastal Plain are cold deserts in the mountain rain shadows; they are classic periglacial environments (⇓Ferrians 1994). Their total lack of glaciation throughout the Pleistocene is perhaps most famed for the consequent survival of many rich placer gold deposits, notably in the Klondike valley, just over the border in Canada (⇓Waltham 1995). Fig. 2. Major geomorphological features across Alaska. Permanently frozen ground develops where all the groundwater freezes due to the cooling effect of the air. Continuous permafrost occurs where the mean annual air temperature is lower than about …

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.017
Threshold uncertainty score0.953

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.011
GPT teacher head0.199
Teacher spread0.188 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations2
Published2001
Admission routes1
Has abstractyes

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