NDLI: Indo-Pacific and Atlantic spurs and grooves revisited: the possible effects of different Holocene sea-level history, exposure, and reef accretion rate in the shallow fore reef

Content Provider	Springer Nature Link
Author	Gischler, Eberhard
Copyright Year	2010
Abstract	Shallow fore-reef areas worldwide are usually characterized by spurs and grooves. A comparison of examples from the three world oceans suggests that Indo-Pacific spurs and grooves are shaped predominantly by erosion, whereas western Atlantic spur and groove systems are largely a product of constructive processes. I propose that this difference is caused by regional differences in Holocene sea-level change, which controlled exposure to waves and currents, and reef-accretion rates. The transgressive–regressive sea-level curve in the Indo-Pacific realm, i.e., the Mid-to-Late Holocene sea-level fall in these areas has maintained high-energy conditions in the shallow fore reef. Higher exposure to waves and currents favors erosion and leads to a dominance of crustose coralline algae that have relatively slow growth rates. In the western Atlantic, the transgressive Holocene sea level has caused Mid-to-Late Holocene deepening and has maintained accommodation space for reef accretion. Fast-growing acroporid corals thrive under lower exposure and are more common than coralline algae. The fossil record of the spur and groove system is rather poor, which is probably a consequence of the need of excellent, three-dimensional outcrops for identification.
Starting Page	173
Ending Page	177
Page Count	5
File Format	PDF
ISSN	01729179
Journal	Facies
Volume Number	56
Issue Number	2
e-ISSN	16124820
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-02-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spur Groove Holocene Reef accretion Sea level Ecology Paleontology Geochemistry Biogeosciences Sedimentology
Content Type	Text
Resource Type	Article
Subject	Geology Stratigraphy Paleontology

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