This is an Accepted Article that has been peer-reviewed and approved for publication in the Sedimentology, but has yet to undergo copy-editing and proof correction. Please cite this article as an “Accepted Article”; doi: 10.1111/sed.12360 This article is protected by copyright. All rights reserved. Received Date : 06-Jun-2016 Revised Date : 15-Nov-2016 Accepted Date : 11-Jan-2017 Article type : Original Manuscript Title: Lake sedimentological and ecological response to hyperthermals: Boltysh impact crater, Ukraine Running title: Lake formation of Boltysh impact crater lake Alena Ebinghaus* 1 and David W. Jolley 1 , Steven D. Andrews 2 , David B. Kemp 1 *corresponding author 1 University of Aberdeen, Department of Geology and Petroleum Geology, Meston Building, Aberdeen AB24 3UE, UK, email: aebinghaus@abdn.ac.uk 2 CASP, West Building, 181A Huntingdon Road, Cambridge CB3 0DH, UK Associate Editor – Daniel Ariztegui ABSTRACT The Boltysh meteorite impact crater, Ukraine, formed at the Cretaceous-Paleogene boundary at ca 65.2 Ma. A borehole drilled in the central part of the crater cored a >400 m thick high-resolution lacustrine succession that covers the Dan-C2 hyperthermal event associated with a negative carbon isotope excursion. Continuous terrestrial records of past hyperthermals are of limited availability, which makes this record a unique case study of the continental impact of rapid climate warming. This study uses high-resolution sedimentological core log data together with thin section, X-ray diffraction,