INQUA Sub-Commission for Tephrochronology and Volcanism (SCOTAV)

International Field Conference and Workshop on Tephrochronology and Volcanism:
"Tephra Rush 2005"

Dawson City, Yukon Territory, Canada - July 31st to August 8th, 2005


Organizing Committee


Theme Formats

Provisional Programme

Field Trip Highlights

Registration and Costs

Accommodation and Food

Abstract Submission

Getting to the Yukon


Trouble with this web site? Email Alberto Reyes

Gold Rush-era miners excavating frozen gold-bearing gravel
in the Klondike Goldfields


Sunday, 31st July Monday, 1st August
  • Drive from Whitehorse to Dawson City (field-trip stops along the way)
Tuesday, 2nd August
  • Talks
Wednesday, 3rd August
Thursday, 4th August
  • Talks
  • Conference banquet and talk by Paul Matheus (title TBA)
Friday, 5th August
Saturday, 6th August
Sunday, 7th August
  • Field excursion: Dawson City to Whitehorse. END OF CONFERENCE
Monday, 8th August
  • Participants leave for their various destinations


Tuesday, 2nd August

Session 1: Beringia      Chair: Brad Pillans
8.15 - 8.30
D. Froese
Introductory comments
8.30 - 9.00
J. Beget
Eruptive processes and tephrochronology in the Aleutian arc, Alaska
9.00 - 9.30
S. Preece
The Wrangell volcanic field, Alaska
9.30 - 10.00
D. Froese
Tephrochronologic constraints on the evolution of Plio-Pleistocene Arctic climate in eastern Beringia

10.00 - 10.30         COFFEE BREAK

Beringia (cont.)      Chair: Jim Beget
10.30 - 11.00
J. Westgate
Late Cenozoic distal tephrochronological studies in interior Alaska and Yukon: methods and results
11.00 - 11.30
G. Hare
Ice patch archaeology talk (exact title TBA)
11.30 - 11.55
K. Yoshikawa
Stable isotope characteristics of ice wedges near Fairbanks, Alaska
11.55 - 12.15
W. Lebarge
Gold in the Klondike (exact title TBA)

12.15 - 2.00           LUNCH

Session: INTIMATE      Chair: H. Machida
2.00 - 2.25
B. Alloway
Onshore-offshore correlation of Pleistocene rhyolitic eruptions from New Zealand
2.25 - 2.50
D. Lowe
Sharpening the tools: improving tephra isochrons for New Zealand
2.50 - 3.15
T. Fukuoka
Tephrochronological dating of tephra in Antarctic ice using micro tephra particles – H15 ice core as a case study
3.15 - 3.40
S. Davies
Late Quaternary tephrochronology of the Greenland ice cores
3.40 - 4.05
C. Chen
Insights of the Toba tephra layer in the Indian Ocean from ODP Leg 121, site 758

4.05 - 4.30         COFFEE BREAK

4.30 - 5.30         Chair: D. Lowe          Discussion of papers given today


Wednesday, 3rd August

Session 3: Characterization and weathered tephra      Chair: T. Fukuoka
8.30 - 8.55
P. Shane
Compositional heterogeneity in tephra beds resulting from magma mingling: implications for tephrochronology
8.55 - 9.20
N. Pearce
Laser ablation ICP-MS and the analysis of single glass shards from tephra deposits: current status and future prospects
9.20 - 9.45
I. Tamura
Characteristics for identification of the Pliocene and Early Pleistocene marker tephras in central Japan
9.45 - 10.10
T. Suzuki
EDS analysis of titanomagnetites in weathered middle Pleistocene tephras and its application for the chronology of the fluvial surfaces in Kanto Plain, central Japan
10.10 - 10.35
W. Huff
Stratigraphic correlation of altered ashfalls

10.35 - 11.00         COFFEE BREAK

Session 4: Chronology, environmental      Chair: N. Pearce
11.00 - 11.25
H. Moriwaki
New glass fission-track ages of Middle Pleistocene tephras, Yakushima Island, southern Japan
11.25 - 11.50
C. Buck
Bayesian tools for the refinement of radio-carbon-based chronologies
11.50 - 12.15
A. Church
Mercury concentrations of the Mazama ash: implications for the atmospheric mercury budget


12.15 - 2.00         LUNCH - Posters to be placed on walls at this time

Session 5: Cryptotephras and some applications      Chair: S. Davies
2.00 - 2.25
S. Wastegård
New cryptotephras from the Last Glacial/Interglacial Transition in Scandinavia and the British Isles
2.25 - 2.50
J. Schokker
Eemian distal tephra layers in The Netherlands and their importance for improving the chronology of regional geological models
2.50 - 3.15
M. Gehrels
Developing a Holocene crypto-tephrostratigraphic record for the North Island, New Zealand
3.15 - 3.40
R. Gehrels
Tephrochronology as a tool for reconstructing Holocene sea-level changes: a case from western Iceland

3.40 - 4.00         COFFEE BREAK

Session 6: Poster      Chair: J. Westgate
Time:  4.00 - 5.00
Presenters to give a 5-minute summary of their poster. Posters will remain on walls until end of sessions on  Thursday, 4th August
A. Reyes
Cryostratigraphy, tephrochronology, and paleoclimate studies of relict permafrost in the Klondike region of Yukon Territory
B. Jensen
A Middle Pleistocene distal tephra record in Yukon-Charley National Preserve, east-central Alaska
S. Katoh
Paleoenvironmental changes during the last 50,000 years
reconstructed from the moor deposits at Ohnuma in the Chugoku Mountains, western Japan

S. Andreastuti
Stratigraphy, age and correlation of a tephra marker bed found in central and east Java, Indonesia: could this wide-spread marker be the “Milk sea” as described in the Calcutta Stone and have contributed to the demise of the c.10th century Hindu Mataram civilization?   
S. Davies
Trace element analysis of basaltic tephras from the Greenland ice-cores
S. Wastegård
Distribution, age and geochemistry of North Atlantic ash zones from marine isotope stages 3 and 2

7.00 - 8.00      Public Talk      G. Heiken
Avoidable Disasters: Volcanoes and Humans


10.10 - 10.30         COFFEE BREAK

Session 8: Regional studies (cont.)      Chair: S. Wastegård
10.30 - 10.55
K. Aoki
Late Quaternary tephrochronology of sediment cores in the NW Pacific Ocean
10.55 - 11.20
Y. Sugiuchi
Tephrochronology of recent (~ 1200 YBP) Mt. Fuji eruption history using rhyolitic tephra derived from outside Mt. Fuji Volcano
11.20 - 11.45
L. Zoeller
Is “Eltville tephra” really a tephrostratigraphic marker in central European loess of the LGM?

12.00 - 2.00         LUNCH

Session 8: Regional studies (cont.)      Chair: S. Wastegård
2.00 - 2.25
J. Beget
Terrestrial – marine correlation of the Dawson tephra
2.25 - 2.50
D. Froese
Seasonality of the late Pleistocene Dawson tephra and preservation of a buried riparian surface in central Yukon
2.50 - 3.15
J. Riehle
Stratigraphic and compositional complexities of the late Quaternary Lethe tephra in  south-central Alaska

3.15 - 3.30         COFFEE BREAK

3.30 - 5.00         Chair: B. Alloway
Discussion of papers given on Wednesday and Thursday

7.00         CONFERENCE BANQUET         Talk by Paul Matheus, title TBA