Results 21 to 30 of about 3,874 (218)

Study on the Characteristics of Pore Change in Tuff under the Frost and Salt Action Using High-Precision CT Scanning Equipment

Applied Sciences, 2023
Using high-precision CT scanning equipment, two series of tests on frost and salt weathering were conducted to investigate the characteristics of pore change in tuff.
Lilei Chen, Yue Sun, Chao Wang, Peng Sha, Huijun Jin, Minghao Liu, Anyuan Li   +6 more
doaj   +1 more source

Sequence of tuffs between the KBS Tuff and the Chari Tuff in the Turkana Basin, Kenya and Ethiopia

Journal of the Geological Society, 2006
This paper describes a sequence of tuffs between the KBS and the Chari Tuff of Omo Group formations in Kenya and Ethiopia. These tuffs have recently been shown to be 1.87 ± 0.02 Ma and 1.38 ± 0.03 Ma in age, respectively. The sequence of tuffs that is derived is consistent with 40 Ar/ 39 Ar ...
Brown, F H, Heileab, Bereket, McDougall, Ian   +2 more
openaire   +4 more sources

A new approach to determining the slip surface in tuff to determine the volume of landslide material: A case study on the West Sinjai road section, Sinjai Regency, South Sulawesi, Indonesia

Journal of Degraded and Mining Lands Management
Analysis of landslide slip surface based on the engineering properties of tuff rocks, including shear strength, water content, and infiltration rate on the West Sinjai road section, South Sulawesi, Indonesia.
Busthan Busthan, Hendra Pachri, Ilham Alimuddin, Syamsul Bahri, Syarifullah Bundang   +4 more
doaj   +1 more source

Lithofacies, mineralogy, and pore characteristics of Permian marine tuffaceous rocks in the Sichuan Basin

Frontiers in Earth Science, 2023
Alongside volcanic eruptions in the middle and late Permian, the sedimentary environment and process changed, and the lithofacies and mineralogical characteristics varied conspicuously from the marine sediments in this period.
Rong Li, Rong Li, Zhifu Xiong, Zecheng Wang, Zecheng Wang, Wuren Xie, Wuren Xie, Wenzheng Li, Nan Su, Nan Su   +9 more
doaj   +1 more source

Evaluating the Performance of Cocopeat and Volcanic Tuff in Soilless Cultivation of Roses

Plants
Roses are increasingly being grown in soilless systems to increase productivity and reduce the challenges associated with soil-based cultivation. This study investigates the effects of using cocopeat and volcanic tuff substrates, the particle size of ...
Malik G. Al-Ajlouni, Yahia A. Othman, Nour S. Abu-Shanab, Lujain F. Alzyoud   +3 more
doaj   +1 more source

Typological study of Oya stone buildings and townscapes: A case study of Nishine District, Tokujirou Town, Utsunomiya City

Japan Architectural Review, 2021
The Japanese style of architecture has traditionally been centered on wood; however, stone from the surrounding regions has also been used as a construction material in some instances.
Akio Yasumori
doaj   +1 more source

Arsenic Mineral in Volcanic Tuff, a Source of Arsenic Anomaly in Groundwater: City of Chihuahua, Mexico

Geosciences, 2022
Arsenic is a naturally occurring trace element that causes many health effects when present in drinking water. Elevated arsenic concentrations in water are often attributed to nearby felsic volcanic sequences; however, the specific rock units to which ...
Minghua Ren, José Alfredo Rodríguez-Pineda, Philip Goodell   +2 more
doaj   +1 more source

Research on characteristics and geological genesis of large-scale deep-seated landslide in tuff formation

Frontiers in Earth Science
In engineering practice, engineers generally treated tuff as a lumpy material with a poorly defined laminated structure and a rock group that was not susceptible to slide failure. Most studies of tuff landslides had focused on small clastic landslides in
Mengqi Xue, Guangli Xu, Guangli Xu, Feixiang Yao, Zhuo Ma   +4 more
doaj   +1 more source

Multimethod Approach to the Study of Recent Volcanic Ashes from Tengger Volcanic Complex, Eastern Java, Indonesia

Geosciences, 2017
Volcanic ash is a volcanic product with a wide distribution that can be used as a geological marker. In volcanic regions such as Indonesia, the identification of the sources of volcanic ash and tuff layers from different volcanoes or eruptive events is a
Nono Agus Santoso, Satria Bijaksana, Kazuto Kodama, Djoko Santoso, Darharta Dahrin   +4 more
doaj   +1 more source

Tuff, Flint, and Hazelnuts: Final Palaeolithic and Mesolithic Occupation at Netherhall Road, Maryport, Cumbria

Internet Archaeology, 2022
Evidence for Final Palaeolithic and Mesolithic occupation at Maryport, Cumbria, was discovered during the excavation of Roman occupation features by CFA Archaeology Ltd. A varied lithic assemblage was recovered including worked flint (55%) and tuff (43%),
Ann Clarke, Magnus Kirby
doaj   +1 more source