The concept of cryo-conditioning in landscape evolution — Comment to the paper published by Ivar Berthling and Bernd Etzelmüller,Quaternary Research 75 (2011) 378–384

The term “cryo-conditioning,” proposed by the authors for classifying specific landform association in periglacial landscapes, needs to be defined more precisely. A starting point could be the proper understanding of the term “Cryo-” in the various compound words found in various disciplines. This is also important for a correct understanding of the proposed concepts, since it concerns one of the most important processes in nature: the phase transition of water between solid and liquid. Cold-temperate transition surfaces in polythermal glaciers and at the permafrost base in their forelands can act as a specific hub between the glacial and periglacial domains.     

Comments on the paper published by Sial et al (2016), Mercury enrichments and Hg isotopes in Cretaceous–Paleogene boundary successions: Links to volcanism and palaeoenvironmental impacts. Cretaceous Research,v. 66, pp. 60–81

The paper published by Sial et al. (2016) contains geochemical information which does not fit into the scheme of the existing planktonic foraminiferal succession across the K/Pg boundary in the Um Sohryngkew River section, Meghalaya India, worked out by either Mukhopadhyay (2008) or Pandey (1981, 1990). The K/Pg boundary reported by Sial et al. (2016) is not compatible with any of these two. In this perspective some of the controversies are highlighted.     

<Emphasis Type="Bold">Quaternary Stratigraphy of the Koratallaiyar-Cooum Basins,Chennai</Emphasis> by Hema Achyutnan and Nagalakshmi Thirunavakarasu. Jour. Geol. Soc. India,v.73, 2009, pp.683–696

Discussion

Quaternary Stratigraphy of the Koratallaiyar-Cooum Basins, Chennai by Hema Achyutnan and Nagalakshmi Thirunavakarasu. Jour. Geol. Soc. India, v.73, 2009, pp.683–696     

Solving unsolvable problems in stratigraphy (Comments to the paper “New data on the magnetostratigraphy of the Jurassic–Cretaceous boundary interval,Nordvik Peninsula (northern East Siberia)” by V.Yu. Bragin,O.S. Dzyuba,A.Yu. Kazansky,and B.N. Shurygin)

In this study we analyze the importance of new magnetostratigraphic data on the Nordvik section for solving the problem of detailed Tethyan–Boreal correlation around the Jurassic–Cretaceous boundary with a special emphasis on the aspects of interpretation of the paleomagnetic data in magnetostratigraphic studies and the need for the integrated (paleontological and paleomagnetic) approach to recognition of the base of the Berriasian.     

<Emphasis Type="Bold">Rhodophycean algae from the Lower Cretaceous of the Cauvery Basin,South India</Emphasis> by P.K. Misra,S. Kishore,S.K. Singh and A.K. Jauhri. Jour. Geol. Soc. India,v.73, 2009, pp.325–334

Discussion

Rhodophycean algae from the Lower Cretaceous of the Cauvery Basin, South India by P.K. Misra, S. Kishore, S.K. Singh and A.K. Jauhri. Jour. Geol. Soc. India, v.73, 2009, pp.325–334     

Comment on “Structural geology of the Upper Cretaceous Chalk Central Mass,Isle of Wight,UK” by Rory Mortimore. Proceedings of the Geologists’ Association,vol. 122 (2), 2012, pp. 298–331

The Chalk Group of the Central Downs of the Isle of Wight forms a relay ramp between two major inverted extensional faults. Mortimore (2011) presented a structural model of this key area based on a geological map constructed from detailed logging of a limited set of exposed sections. The area has been recently mapped at 1:10,000 scale by the British Geological Survey. Our interpretation of the geological structure differs significantly from that proposed by Mortimore, and suggests that Chalk has relatively uniform dips that progressively steepen towards the hanging wall of the E-W oriented basement faults. However, a suite of mapped extensional faults indicates an element of differential movement or transpression along the main basement structures.