Results 121 to 130 of about 208,933 (390)

Uncertainty quantification and reduction in the characterization of subsurface stratigraphy using limited geotechnical investigation data

Underground Space, 2020
Subsurface stratigraphy is critical to the design, construction, and subsequent performance of geotechnical structures. However, in practice it is impossible to identify the stratigraphy of a subsurface geological domain with absolute certainty, due to ...
Xiangrong Wang
doaj  

On building and fitting a spatio-temporal change-point model for settlement and growth at Bourewa, Fiji Islands [PDF]

arXiv, 2010
The Bourewa beach site on the Rove Peninsula of Viti Levu is the earliest known human settlement in the Fiji Islands. How did the settlement at Bourewa develop in space and time? We have radiocarbon dates on sixty specimens, found in association with evidence for human presence, taken from pits across the site.
arxiv  

Lunar stratigraphy as revealed by crater morphology, a critical review [PDF]

Lunar craters morphology and lunar surface stratigraphy ...
Heuze, F. E.
core   +1 more source

A review of late Quaternary silicic and some other tephra formations from New Zealand: their stratigraphy, nomenclature, distribution, volume, and age. [PDF]

, 1990
The stratigraphic relationships and distribution of 36 named late Quaternary (≤c. 50 000 yr B P.) silicic tephra formations, erupted from 4 volcanic centres—Okataina, Taupo, Maroa, and Tuhua (Mayor Island)—are presented.
Froggatt, Paul C., Lowe, David J.
core   +2 more sources

Early Cretaceous–Late Miocene Basin–Mountains Pattern in the Northeastern Margin of the Tibetan Plateau, NW China: Evidence From Detrital Zircon Chronology in the Lanzhou Basin

Geological Journal, EarlyView.
Using DZmix and DZstats models, we quantified the contributions of potential sources of the Lanzhou basin. Our findings indicate that the Cenozoic cooling and denudation signals primarily originated from Qilian and West Qinling, which were the main sediment sources.
Hang Liu, Hu–jun Gong, Fen–hong Luo, Rui Zhang   +3 more
wiley   +1 more source

New 3D Velocity Model (mTAB3D) for Absolute Hypocenter Location in Southern Iberia and the Westernmost Mediterranean

Earth and Space Science
The Trans‐Alboran Shear Zone is one of the most seismically active areas in the westernmost Mediterranean, where a wide variety of tectonic domains have developed within the context of oblique convergence between Eurasia and Africa plates. In this region,
José Luis Sánchez‐Roldán, José A. Álvarez‐Gómez, José J. Martínez‐Díaz, Paula Herrero‐Barbero, Hector Perea, Juan V. Cantavella, Lucía Lozano   +6 more
doaj   +1 more source

High‐resolution sequence stratigraphy of the Middle Triassic Sunset Prairie Formation, Western Canada Sedimentary Basin, north‐eastern British Columbia

The Depositional Record, 2020
The Middle Triassic Sunset Prairie Formation has been recently identified between the Lower Triassic Montney Formation and the Middle Triassic Doig Formation in the Western Canada Sedimentary Basin.
Carolyn M. Furlong, Murray K. Gingras, John‐Paul Zonneveld   +2 more
doaj   +1 more source

Bio-, Magneto- and event-stratigraphy across the K-T boundary [PDF]

Determining the time and the time structure of rare events in geology can be accomplished by applying three different and independent stratigraphic methods: Biostratigraphy, magneto-stratigraphy and event-stratigraphy.
Mauritsch, H. J., Preisinger, A., Stradner, H.   +2 more
core   +1 more source

Strontium isotope stratigraphy: LOWESS version 3: best fit to the marine Sr-isotope curve for 0-509 Ma and accompanying look-up table for deriving numerical age [PDF]

, 2001
An improved and updated version of the statistical LOWESS fit to the marine 87Sr/86Sr record and a revised look-up table (V3:10/99; available from j.mcarthur@ucl.ac.uk) based upon it enables straightforward conversion of 87Sr/86Sr to numerical age, and ...
Bailey, T.R., Howarth, R.J., McArthur, J.M.   +2 more
core  

Expedition 302 geophysics: integrating past data with new results [PDF]

, 2006
In preparation for IODP Expedition 302, Arctic Coring Expedition (ACEX), a site survey database comprising geophysical and geological data from the Lomonosov Ridge was compiled.
Backman, J., Brinkhuis, H., Clemens, S., Cronin, T., Dickens, G.R., Eynaud, F., Floden, T., Gattacceca, J., Jakobsson, M., Jakobsson, M., Jordan, R.W., Kaminski, M., King, J., Koç, N., Martinez, N.C., Matthiessen, J., McInroy, D., Moore Jr., T.C., Moran, K., O'Regan, M., Onodera, J., Pälike, H., Rea, B., Rio, D., Sakamoto, T., Smith, D.C., St. John, K.E.K., Stein, R., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., Yamamoto, M.   +32 more
core   +1 more source