A6: HUNGARY - Balvany East Site

This page authored by Steve Kershaw


This page gives details of laminated limestones from the Balvany East site. The local succession consists of a sandstone overlain by boundary shales, followed by laminated limestones containing the microbialite. The sequence is made complicated by the common presence of bedding plane slip, so that it is difficult to demonstrate with clarity the nature of most bed contacts. Also stylolites are common, interrupting the fine detail of the succession.

Go to Microbialite Atlas Contents PageGA3_Microb_Contents.htmlGA3_Microb_Contents.htmlshapeimage_1_link_0
Go to PTB map pageGA5_P-T_Boundary.htmlGA5_P-T_Boundary.htmlshapeimage_2_link_0
Go to Hungary Main PageGA40_Hungary_Main.html

Views of dipping beds of laminated limestones. This site has the additional problem of faulting, making determination of the precise sequence impossible.

Details of field appearance of laminated limestones, note the prominent stylolite.

Polished hand specimen of vertically-cut rock showing laminations, considered to be stromatolites.

Micritic limestone with prominent stylolite

Micritic limestone with stylolite. The dark-coloured limestone associated with the stylolite may be microbial, but instead may be related to the stylolite, and therefore diagenetic.

Micritic limestone with unclear structures that may be microbial.

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw

Photo: Steve Kershaw