Results 31 to 40 of about 13,545 (201)

Impact Flux on the Moon

Space: Science & Technology
The crust of the Moon records the complete history of collisions by different-sized projectiles from various sources since its early solidification. Planetary bodies in the inner Solar System experienced similar sources of impactors, and the Moon is an ...
Zhiyong Xiao, Kaichang Di, Minggang Xie, Zongyu Yue, Yangting Lin, Yiren Chang, Yichen Wang, Fanglu Luo, Rui Xu, Hanxing Ouyang   +9 more
doaj   +1 more source

Load Stress Controls on Directional Lava Dome Growth at Volcán de Colima, Mexico

Frontiers in Earth Science, 2019
During eruptive activity of andesitic stratovolcanoes, the extrusion of lava domes, their collapse and intermittent explosions are common volcanic hazards.
Edgar U. Zorn, Edgar U. Zorn, Nicolas Le Corvec, Nick R. Varley, Jacqueline T. Salzer, Thomas R. Walter, Carlos Navarro-Ochoa, Dulce M. Vargas-Bracamontes, Samuel T. Thiele, Raúl Arámbula Mendoza   +9 more
doaj   +1 more source

A Two-Step K-Ar Experiment on Mars: Dating the Diagenetic Formation of Jarosite from Amazonian Groundwaters [PDF]

, 2017
Following K-Ar dating of a mudstone and a sandstone, a third sample has been dated by the Curiosity rover exploring Gale Crater. The Mojave 2 mudstone, which contains relatively abundant jarosite, yielded a young K-Ar bulk age of 2.57 ± 0.39 Ga (1σ ...
Amirkhanoff, Anderson, Bibring, Bischoff, Bish, Blake, Bogard, Bridges, Bristow, Brophy, Cannon, Cassata, Cassata, Changela, Deer, Dehouck, Dekov, Dutrizac, Dutrizac, Ehlmann, Ehlmann, Evernden, Farley, Fassett, Freissinet, Glavin, Gombosi, Grant, Grotzinger, Grotzinger, Halliday, Hamilton, Hartmann, Hartmann, Hartmann, Hassanipak, Hicks, Humayun, Kula, Lee, Leitner, Lofgren, Madden, Mahaffy, Martín-Torres, McEwen, McEwen, McEwen, McSween, Mees, Ming, Minitti, Morris, Morrison, Nachon, Nachon, Nimmo, Nyquist, Ojha, Ojha, Papike, Rampe, Renne, Renne, Robbins, Schwenzer, Siebach, Singer, Smits, Stack, Sutter, Swindle, Thomson, Treiman, Treiman, Treiman, Vaniman, Vasconcelos, Vasconcelos, Wolff-Boenisch   +79 more
core   +2 more sources

The beginning of time? Evidence for catastrophic drought in Baringo in the early nineteenth century [PDF]

, 2016
New developments in the collection of palaeo-data over the past two decades have transformed our understanding of climate and environmental history in eastern Africa.
Anacleti A. Odhiambo, Anderson David M., Anderson David M., Avanchers P. Leon des, Baxter P. T. W., Bollig Michael, Bollig Michael, Bollig Michael, David M. Anderson, Davies Matthew I. J., Davies Matthew I. J., Dietz Ton, Dundas K. R., Fosbrooke H. A., Herring Ralph, Hollis A. C., Hughes Lotte, Huntingford G. W. B., Jacobs Alan H., Krapf J. L., Krapf L. J., Lamphear John, Lamphear John, Lamphear John, Lamphear John, Lamphear John, Little Peter D., McCann James C., Nicholson Sharon E., Nicholson Sharon E., Peristiany J. G., Prins A. J. H., Rubensen Sven,, Schlee Gunther, Shetler Jan Bender, Sobania Neal P., Spencer Paul, Spencer Paul, Spencer Paul, Thomson Joseph, Turton David, Verschuren Dirk, Verschuren Dirk, Verschuren Dirk, Waller Richard D., Waller Richard D., Webster J. B., Webster J. B.,   +47 more
core   +1 more source

Constraints on timing and magnitude of early global expansion of the Moon from topographic features in linear gravity anomaly areas

Geophysical Research Letters, 2016
Gravity data obtained from the Gravity Recovery and Interior Laboratory have revealed linear gravity anomalies (LGAs) formed by the early global expansion of the Moon and subsequent magma intrusion.
Natsuki Sawada, Tomokatsu Morota, Shinsuke Kato, Yoshiaki Ishihara, Yoshihiro Hiramatsu   +4 more
doaj   +1 more source

Landing Site Mapping and Lander Localization for Chang’e-5 and Chang’e-6 Lunar Sample Return Missions [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Chang’e-5 and Chang’e-6 are lunar sample return missions in China’s lunar exploration program. In these missions, high-resolution landing site mapping and lander localization were performed to support mission operations and scientific ...
K. Di, Z. Liu, W. Wan, Y. Wang, B. Liu, M. Peng, W. C. Liu, J. Wang, X. Deng, H. Zhang, R. Sheng, Z. Yue, S. Gou   +12 more
doaj   +1 more source

Amazonian-aged fluvial system and associated ice-related features in Terra Cimmeria, Mars [PDF]

, 2016
The Martian climate throughout the Amazonian is widely believed to have been cold and hyper-arid, very similar to the current conditions. However, ubiquitous evidence of aqueous and glacial activity has been recently reported, including channels that can
Adeli, Solmaz, Fawdon, Peter, Hauber, Ernst, Jaumann, Ralf, Kleinhans, Maarten, Le Deit, Laetitia, Platz, Thomas   +6 more
core   +3 more sources

TERRESTRIAL IMPACT CRATERING CHRONOLOGY II : PERIODICITY ANALYSIS WITH THE 2002 DATABASE [PDF]

Journal of Astronomy and Space Sciences, 2003
We examined the hypothesis that the crater formation rate exhibits periodicity, employing data sets of Grieve (1991), Moon et al. (2001), and the Earth Impact Database (2002; DB02). DB02 is known to supercede previous compilations in terms of its accuracy and precision of the ages; it is the first time that this database has been used for periodicity ...
Hong-Kyu Moon, Byung-Hee Min, Seung-Lee Kim   +2 more
openaire   +2 more sources

Out in the cold? A review of Early Middle Palaeolithic settlements in northern Central Europe, age data and geological preconditions for site formation and preservation

Boreas, EarlyView.
The characteristics of settlement of Neanderthals in northern Central Europe during the earlier phases of the Middle Palaeolithic (Marine Isotope Stage 8–6) have been a matter of debate for decades, specifically regarding the population dynamics at such latitudes during the coldest phases. In this paper, we review the known archaeological record of the
Gianpiero Di Maida, Jutta Winsemann, Malte Hoffmann, Tobias Lauer, Utz Böhner, Thomas Terberger   +5 more
wiley   +1 more source

Using Size and Composition to Assess the Quality of Lunar Impact Glass Ages

Geosciences, 2019
Determining the impact chronology of the Moon is an important yet challenging problem in planetary science even after decades of lunar samples and other analyses.
Pham Nguyen, Nicolle Zellner
doaj   +1 more source