PREDICTING LUNAR ECLIPSES IN NORTHERN LATITUDES BY NAKED EYE OBSERVATION

We investigate methods which may have been found appropriate for predicting lunar eclipses in northern Europe, where naked-eye astronomy has to be adapted to conditions, which are different from those found at lower latitudes and in places with less cloud cover. The ecliptic is lower in the sky, and transient phenomena cannot reliably be observed under these astronomical viewing conditions. We consider those techniques, which only require the use of objects made of wood, stone and soil, which use no written records, and which require no understanding of celestial mechanics. We show that it should have been possible to answer the question ‘Is there going to be a lunar eclipse, either tonight or tomorrow night?‘ with surprising accuracy. We include an analysis of the nature of some of the artefacts, which may have been helpful in doing so.     

Palaeobiological features of the coralomorph Amsassia from the Late Ordovician of South China

Lee, M., Elias, R.J., Choh, S.-J. & Lee, D.-J., May 2018. Palaeobiological features of the coralomorph Amsassia from the Late Ordovician of South China. Alcheringa XXX, X–X. ISSN 0311-5518.

Amsassia yushanensis sp. nov. occurs in the Late Ordovician Xiazhen Formation at Zhuzhai, Jiangxi Province of southeastern China. This species is characterized by typical phacelocerioid organization of modules comparable with the other Amsassia species described in recent literature. Bipartite fission, in which a parent module divided into two parts, is by far the most common type of increase in this species; tripartite and quadripartite types of axial fission do occur but are relatively uncommon. Processes of module division are similar to those of A. shaanxiensis and A. koreanensis, and also occurred in tetradiids. In A. yushanensis, restoration of coralla was occasionally accompanied by recovery of a damaged or injured module or group of modules probably following an influx of sediment, as observed in some favositoid corals. Amsassia superficially resembles Lichenaria, a representative genus of the most primitive stock of tabulate corals of Ordovician age, and has likely been mistakenly identified as Lichenaria in the North China Platform. Available information suggests that the validity of a reported occurrence of Lichenaria in the South China Platform is also questionable.

Mirinae Lee [mirinae.lee@kopri.re.kr] Division of Polar Earth-System Sciences, Korea Polar Research Institute, 21990, Incheon, Republic of Korea; Robert J. Elias [Robert.Elias@umanitoba.ca] Department of Geological Sciences, University of Manitoba, Winnipeg, R3T 2N2, Canada; Suk-Joo Choh [sjchoh@korea.ac.kr] Department of Earth and Environmental Sciences, Korea University, Seoul, 02841, Republic of Korea; Dong-Jin Lee [djlee@anu.ac.kr] Department of Earth and Environmental Sciences, Andong National University, Andong, 36749, Republic of Korea and College of Earth Sciences, Jilin University, Changchun 130061, PR China.