From a review of the recent literature and our own observations, the different morphologies
of needle-fiber calcite are classified. They can be characterized as monocrystalline rods …

Spring systems encompass a tremendous range of environmental niches where calcareous
deposits commonly form. Although active springs have been classified according to their …

This textbook outlines the physical, chemical, and biologic properties of the major
sedimentary rocks, as revealed by petrographic microscopy, geochemical techniques, and …

uring the spring of 1960, an uncle showed me a 'petrifying spring'near Plaxtol in Kent
Dwhere twigs had been encased in a calcareous jacket. A twig was collected and having …

Nodules composed of coralline algae have been described since the latter part of the
eighteenth centuary (Pallas 1766, Ellis and Solander 1786). The first extensive descriptive …

Ooids occurring in the shallow‐water Purbeckian carbonate sediments of the Jura
mountains can be grouped into six types. Gradations from one type to another and …

Carbonate minerals have precipitated from seawater for at least the last 3.8 billion years, but
changes in the physical and chemical properties of carbonate rocks demonstrate that the …

Temporal variation in ooid size reflects important changes in physical and chemical
characteristics of depositional environments. Two numerical models are used to evaluate …

Numerous siliceous hot spring systems in the Norris and Lower Geyser Basins of
Yellowstone National Park, Wyoming, provide insights into spring geometries, depositional …

Abstract Calcareous coralline algae (Rhodophyta; Corallinales, Hapalidiales, and
Sporolithales; corallines hereafter) constitute one of the most widespread and successful …