The geological age and paleoenvironment of the lower Seogwipo Formation, Cheju Island, Korea

1999 ◽  
Vol 3 (4) ◽  
pp. 181-190 ◽  
Author(s):  
Baohua Li ◽  
Byong-Kwon Park ◽  
Dongseon Kim ◽  
Han Jun Woo
1989 ◽  
Vol 53 (370) ◽  
pp. 257-262 ◽  
Author(s):  
D. D. Hogarth ◽  
J. E. T. Horne

AbstractA thin (100 m) cover of flat-lying, Recent, calcite-rich tuff at Ndale near Fort Portal, Uganda, unconformably overlies steeply dipping Precambrian metamorphic rocks. It is locally radioactive owing to uranium-rich pyrochlore minerals and lesser amounts of zircon, monazite, titanite, and an unidentified thorium phosphate. In one concentrate, four grains of uranpyrochlore and one grain of uranoan pyrochlore showed a positive linear correlation of Ti with U, and negative linear correlations of Ti with Na, F and Sr. Ta remained high and relatively constant [11 anal., ave. 14.5 (0.6)% Ta2O5]. In the same concentrate the composition of a separate grain of uranoan pyrochlore did not plot on these lines and Ta was comparatively low [2 anal., ave. 4.5 (0.3)% Ta2O5]. The data suggest two separate paths of differentiation. However, zoned grains were not observed. Unit cells were cubic with a = 10.351 ± 0.002 Å for a grain with 12.9% UO2tot and 10.333 ± 0.002 Å for a grain with 26.6% UO2tot. On heating in air the cell size decreased, possibly due to oxidation of U4+. The crystalline nature of these minerals can be attributed to a very young (4000–5000 yr) geological age.


2021 ◽  
pp. 175797592110622
Author(s):  
Sione Tu’itahi ◽  
Huti Watson ◽  
Richard Egan ◽  
Margot W. Parkes ◽  
Trevor Hancock

We now live in a new geological age, the Anthropocene – the age of humans – the start of which coincides with the founding of the International Union for Health Promotion and Education (IUHPE) 70 years ago. In this article, we address the fundamental challenge facing health promotion in its next 70 years, which takes us almost to 2100: how do we achieve planetary health? We begin with a brief overview of the massive and rapid global ecological changes we face, the social, economic and technological driving forces behind those changes, and their health implications. At the heart of these driving forces lie a set of core values that are incompatible with planetary health. Central to our argument is the need for a new set of values, which heed and privilege the wisdom of Indigenous worldviews, as well as a renewed sense of spirituality that can re-establish a reverence for nature. We propose an Indigenous-informed framing to inspire and inform what we call planetary health promotion so that, as the United Nations Secretary General wrote recently, we can make peace with nature.


1989 ◽  
Vol 36 (1) ◽  
pp. 68-74
Author(s):  
Hyeon Tae Kim ◽  
Bin Yoo ◽  
Woo Sung Kim ◽  
Young Whan Kim ◽  
Sung Koo Han ◽  
...  

2020 ◽  
Vol 02 (12) ◽  
pp. 100-112
Author(s):  
Nodir Khairullaevich Davlatov ◽  
◽  
◽  

This article presents the results of long-term stratigraphic studies on the territory of the Kuldzhuktau mountains. Schemes for the division and correlation of Devonian deposits have been created based on complete biostratigraphic data that most effectively reflect the geological age of local stratigraphic units and their reliable correlation with geological age. The tier units of the International Devonian Stratigraphic Scale are substantiated at the present stage of research. Due to the widespread use of conodonts, it was possible to clarify the physical and age volumes, as well as the sequence of Devonian deposits in the territory of Kuldzhuktau, and almost completely reconstruct the Devonian section.


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