Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Roald Fryxell"'
Publikováno v:
Science. 183:651-654
Interference by tribothermoluminescence and by regeneration thermoluminescence can be eliminated for burned flint if thin polished slices are used instead of the powders conventionally used in thermoluminescent measurements. Measurement of the intern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d524cff4d28b73227cdd56ae6d245fd
https://doi.org/10.1126/science.183.4125.651
https://doi.org/10.1126/science.183.4125.651
Publikováno v:
Quaternary Research. 10:171-180
Pumice layers of set S from Mount St. Helens can be correlated with certain ash beds associated with young flood deposits of the channeled scabland. The correlation points to an age of about 13,000 14C yr B.P. for the last major flood to have crossed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::104bf822a901d8dcbf92c02744cd84fc
https://doi.org/10.1016/0033-5894(78)90099-6
https://doi.org/10.1016/0033-5894(78)90099-6
Publikováno v:
Quaternary Research. 16:1-17
Direct tracing of beds during excavation in May 1973, confirmed that the artifact-bearing layers at Hueyatlaco underlie 10 m of fine-grained, water-laid deposits that constitute part of the wide-spread Valsequillo gravels. Dissection of these deposit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c1f5be36ae40aa6255f90d909a7b81d
https://doi.org/10.1016/0033-5894(81)90124-1
https://doi.org/10.1016/0033-5894(81)90124-1
Publikováno v:
Science. 167:734-737
Two drive-tube core samples were obtained at Tranquillity Base. Fines include much glass, are unweathered, medium gray, loose, nonstructured, very weakly coherent, and demonstrate both accumulation and mixing in a waterless vacuum environment. In con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ae18fc44701d089cad0c8ec5c854a7c
https://doi.org/10.1126/science.167.3918.734
https://doi.org/10.1126/science.167.3918.734
Autor:
Roald Fryxell
Publikováno v:
Journal of Glaciology. 5:727-734
Névé-capped snow pillars found on Teton Glacier in August 1956 were formed in the same manner as the ice cones of glacier tables, the névé acting in this instance as the protective cover usually provided by slabs of rock. Measurements of the larg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::320f1a8ae2e777f2b07e68728e7d8092
https://doi.org/10.3189/s0022143000018724
https://doi.org/10.3189/s0022143000018724
Autor:
Henry T. Irwin, Carl E. Gustafson, Richard D. Daugherty, Roald Fryxell, Bennie C. Keel, Tadeusz Bielicki
Publikováno v:
American Antiquity. 33:511-515
A living-site including human bones, bone midden, and artifacts has been discovered in sediments of mid-Pinedale age at the Marmes Rockshelter archaeological site in southeastern Washington. Radiocarbon dates, from sediments overlying the buried floo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65c1dd628f4aadbdff261b2c42564c7b
https://doi.org/10.2307/278610
https://doi.org/10.2307/278610
Autor:
Roald Fryxell
Publikováno v:
Science. 147:1288-1290
Physiographic and stratigraphic evidence supports the regional correlation of two volcanic ash layers with extinct Mount Mazama at Crater Lake, Oregon, and Glacier Peak in the northern Cascade Range of Washington. A radiocarbon age of 12,000 +/- 310
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac759a981bd82da63114725a04ca66c1
https://doi.org/10.1126/science.147.3663.1288
https://doi.org/10.1126/science.147.3663.1288
Autor:
Roald Fryxell, Virginia C. Steen
Publikováno v:
Science. 150:878-880
Weathering has had little differential effect on modal values of the index of refraction of pumice glasses from the eruptions of Mount Mazama and Glacier Peak thousands of years ago. Confidence is thus increased that the ranges of values for the inde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1d4d46538c9430410bb2ad2416d160f
https://doi.org/10.1126/science.150.3698.878
https://doi.org/10.1126/science.150.3698.878
Publikováno v:
The Quaternary of the U.S.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2580f73b52ecf0f52cfb1b4bfcae182
https://doi.org/10.1515/9781400876525-015
https://doi.org/10.1515/9781400876525-015
Autor:
Richard D. Daugherty, Roald Fryxell
Publikováno v:
Science News. 97:362
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78820cb5208d0c50cdb654aea32a8a31
https://doi.org/10.2307/3954740
https://doi.org/10.2307/3954740