Thin section micrograph of a stromatolite crust of bed 32, Mactra/Aalensis Subzone, accompanied by marlstone with ooids showing mixed limonitic-calcareous cortices. Note the very dense lamination lacking a fenestral fabric and morphological microbial remains.

 
 
  Part of: Arp G, Balmuk Y, Seppelt S, Reimer A (2023) Biostratigraphy and sedimentary sequences of the Toarcian Hainberg section (Northwestern Harz foreland, Northern Germany). Zitteliana 97: 1-27. https://doi.org/10.3897/zitteliana.97.110677