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Zeolites replacing plant fossils in the Denver formation, Lakewood, Colorado.

Rocks & Minerals

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Abstract

Well-developed crystals of heulandite and stilbite, within fossil wood, occur in sedimentary rocks in Lakewood, Jefferson County. The rocks belong to the Denver formation, a locally fossiliferous deposit of fluvial claystone, siltstone, sandstone and conglomerate, containing some volcanic mudflows (andesitic) of late Cretaceous to Palaeocene age. Altered volcanic glass released Na and Ca into the ground-water and subsequently zeolites were crystallized in the open spaces between grains and within fossil plant structures. Minor pyrite, quartz (jasper), calcite and apatite also occur as replacements of fossil wood. Similar zeolite occurrences in other areas are reviewed.-R.S.M.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Zeolites replacing plant fossils in the Denver formation, Lakewood, Colorado.
Series title:
Rocks & Minerals
Volume
59
Issue:
1
Year Published:
1984
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Rocks & Minerals
First page:
18
Last page:
28
Number of Pages:
11