TY JOUR TI Ediacaran-Cambrian rocks of the Upper Kalar depression: mineralogy, weathering trends, methodological challenges KW Ediacaran KW Cambrian KW Udokan region KW climate KW chemical weathering proxies JO Russian Journal of Earth Sciences AU Merenkova, S.I. AU Kuz'mina, T.G. AU Karpova, E.V. AU Gabdullin, R.R. AU Vodovozov, V.Y. AU Romashova, T.V. AU Hohlova, I.V. PY 2024 IS 24 PB Geophysical Center of the Russian Academy of Sciences