Microbial carbonates were major components of early Paleozoic reefs until coral-
stromatoporoid-bryozoan reefs appeared in the mid-Ordovician. Microbial reefs were …

Abstract The Ordovician of Scandinavia (ie Denmark, Norway and Sweden) has been
investigated for over two centuries and, through time, various chronostratigraphic schemes …

This paper summarizes recent knowledge on the palaeontology, biostratigraphy, correlation,
sea-level and climate history and isotopic geochemistry of the Ordovician rocks in the …

Results of conodont-based δ 18 O phos studies from two core sections in Estonia
(Mehikoorma-421 and Valga-10) indicate that the pre-Hirnantian Late Ordovician was …

The widespread growth of reefs formed by a framework of biogenic constructors and frame-
lacking carbonate mounds began on Baltica during Ordovician time. Previously, Ordovician …

Bryozoans, stromatoporoid sponges, and tabulate corals, all colonial metazoans with
lamellar, encrusting growth forms, developed and simultaneously diversified during the …

This study documents previously unknown taxonomic and morphological diversity among
early Palaeozoic crinoids. Based on highly complete, well preserved crown material, we …

The reefs of the Vasalemma Formation, late Sandbian, Late Ordovician, of northern Estonia
contain an exceptional rich and abundant bryozoan fauna. They are an example of …

Seven species of cornulitids, one unidentified tubicolous shell, and the problematic
bryozoan Lagenosypho Spandel, 1898 are here described from the Katian of Baltica. Three …

The first appearance of pinnacle reef tracts, composed of hundreds to thousands of localized
biogenic structures protruding tens to hundreds of meters above the surrounding mid …