Abstract
Extremely fine sedimentary laminations of the lacustrine Early Cretaceous Yixian Formation were studied in the excavated Sihetun Fossil Museum section in western Liaoning, China. The section consists mainly of mudstones, shales and layers of volcanic ash. The mudstones and shales are composed of siliciclastic and organic-rich laminae. Most of the laminations are varves that record seasonal climatic changes. Varve thickness measurements show that the sedimentation rate for the majority of the mudstones and shales was 0.2–0.7 mm/year. Quiet, anoxic lacustrine bottom waters were critical for the preservation of the laminations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
