Journal of Volcanology and Geothermal Research , 2005, V 147, N 1-2, 1 October.

The evolution of the magmatic system of Stromboli 
volcano during the Vancori period (26–13.8 ky)  • 
Joaquin A. Cortes, Marjorie Wilson, Eric Condliffe,
Lorella Francalanci and Darren G. Chertkoff
Pages 1-38 

Application of the Gauss theorem to the study of 
silicic calderas: The calderas of La Primavera, 
Los Azufres, and Los Humeros (Mexico)  • 
J.O. Campos-Enriquez, F. Dominguez-Mendez, M. Lozada-Zumaeta, 
H.F. Morales-Rodriguez and J.A. Andaverde-Arredondo
Pages 39-67 

Paleomagnetic and magnetic fabric studies of the 
San Gaspar ignimbrite, western Mexico—constraints
on emplacement mode and source vents  • 
L.M. Alva-Valdivia, J. Rosas-Elguera, 
T. Bravo-Medina, J. Urrutia-Fucugauchi, 
B. Henry, C. Caballero, M.L. Rivas-Sanchez, 
A. Goguitchaichvili and H. Lopez-Loera
Pages 68-80 

Correlation of Plio–Pleistocene Tephra in Ethiopian
and Kenyan rift basins: Temporal calibration of 
geological features and hominid fossil records  • 
Giday WoldeGabriel, William K. Hart, Shigehiro Katoh, 
Yonas Beyene and Gen Suwa
Pages 81-108 

Magmatic evolution of the Heibarsporbur ridge, NE-Iceland  • 
Kristjan Jonasson
Pages 109-124 

The 12.1 ka Middle Toluca Pumice: A dacitic 
Plinian–subplinian eruption of Nevado de 
Toluca in Central Mexico  • 
J.L. Arce, K.E. Cervantes, J.L. Macias 
and J.C. Mora
Pages 125-143 

Three-dimensional P-wave velocity structure 
of Tungurahua Volcano, Ecuador  • 
Indira Molina, Hiroyuki Kumagai, Jean-Luc Le Pennec
and Minard Hall
Pages 144-156 

Eruption reconstruction, formation of flow-lobe 
tumuli and eruption duration in the 5900 BP 
Helgafell lava field (Heimaey), south Iceland  • 
Hannes B. Mattsson and Armann Hoskuldsson
Pages 157-172 

Dynamic response of frequent tremors at Aso
volcano to teleseismic waves from the
1999 Chi-Chi, Taiwan earthquake  • 
Masatoshi Miyazawa, Ichiro Nakanishi, 
Yasuaki Sudo and Takahiro Ohkura
Pages 173-186 

Aquifers and groundwater within active shield volcanoes.
Evolution of conceptual models in the 
Piton de la Fournaise volcano  • 
Jean-Lambert Join, Jean-Luc Folio and Bernard Robineau
Pages 187-201