The earliest evolutionary link of metazoan bioconstruction: Laminar stromatoporoid-bryozoan reefs from the Middle Ordovician of Korea

Jongsun Hong, Jae Ryong Oh, Jeong Hyun Lee, Suk-Joo Choh, Dong Jin Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Sub-metre-scale patch reefs composed primarily of stromatoporoids and bryozoans are reported from the Duwibong Formation (upper Middle Ordovician), Taebaeksan Basin, Korea, in the eastern margin of the Sino-Korean Block. The reef framework is constructed of alternating thin laminae of the primitive labechiid stromatoporoid Cystostroma, the bryozoan Nicholsonella, subordinate Solenopora and minor siliceous sponges. Alternating laminae of stromatoporoids and bryozoans are largely responsible for the formation of a globular framework composed of columnar, branching, bulbous to irregular masses. Solenopora sporadically occurring as tiny patches or thin laminae attached to the stromatoporoid-bryozoan framework is considered to be subordinate encrusters. Siliceous sponges occur within the stromatoporoid-bryozoan framework and within the growth framework and bored cavities, interpreted as subordinate encrusters and cryptic dwellers. The compact globular framework of the Duwibong stromatoporoid-bryozoan consortium represents a new type of Ordovician skeletal bioconstruction, but with a certain structural similarity to Lower Ordovician bryozoan reefs in the South China Block. Together with coeval labechiid reefs occurring near the current study area, the Duwibong reefs suggest that incursion of the primitive stromatoporoids into the earliest bryozoan reefs resulted in the dominance of reef-building stromatoporoids in peri-Gondwana in contrast to coeval reefs in Laurentia, which commonly contain tabulate corals.

Original languageEnglish
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
DOIs
Publication statusAccepted/In press - 2017 Jan 1

Fingerprint

bryozoan
metazoan
Korean Peninsula
Ordovician
reefs
reef
laminae (animals)
Bryozoa
Porifera
sponge
Laurentia
Gondwana
branching
corals
coral
cavity
basins
China
basin

Keywords

  • Darriwilian
  • Globular framework
  • GOBE
  • Reef evolution
  • Skeletal reef

ASJC Scopus subject areas

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes
  • Palaeontology

Cite this

The earliest evolutionary link of metazoan bioconstruction : Laminar stromatoporoid-bryozoan reefs from the Middle Ordovician of Korea. / Hong, Jongsun; Oh, Jae Ryong; Lee, Jeong Hyun; Choh, Suk-Joo; Lee, Dong Jin.

In: Palaeogeography, Palaeoclimatology, Palaeoecology, 01.01.2017.

Research output: Contribution to journalArticle

@article{a58769ffa318413d8dabc512687e4eba,
title = "The earliest evolutionary link of metazoan bioconstruction: Laminar stromatoporoid-bryozoan reefs from the Middle Ordovician of Korea",
abstract = "Sub-metre-scale patch reefs composed primarily of stromatoporoids and bryozoans are reported from the Duwibong Formation (upper Middle Ordovician), Taebaeksan Basin, Korea, in the eastern margin of the Sino-Korean Block. The reef framework is constructed of alternating thin laminae of the primitive labechiid stromatoporoid Cystostroma, the bryozoan Nicholsonella, subordinate Solenopora and minor siliceous sponges. Alternating laminae of stromatoporoids and bryozoans are largely responsible for the formation of a globular framework composed of columnar, branching, bulbous to irregular masses. Solenopora sporadically occurring as tiny patches or thin laminae attached to the stromatoporoid-bryozoan framework is considered to be subordinate encrusters. Siliceous sponges occur within the stromatoporoid-bryozoan framework and within the growth framework and bored cavities, interpreted as subordinate encrusters and cryptic dwellers. The compact globular framework of the Duwibong stromatoporoid-bryozoan consortium represents a new type of Ordovician skeletal bioconstruction, but with a certain structural similarity to Lower Ordovician bryozoan reefs in the South China Block. Together with coeval labechiid reefs occurring near the current study area, the Duwibong reefs suggest that incursion of the primitive stromatoporoids into the earliest bryozoan reefs resulted in the dominance of reef-building stromatoporoids in peri-Gondwana in contrast to coeval reefs in Laurentia, which commonly contain tabulate corals.",
keywords = "Darriwilian, Globular framework, GOBE, Reef evolution, Skeletal reef",
author = "Jongsun Hong and Oh, {Jae Ryong} and Lee, {Jeong Hyun} and Suk-Joo Choh and Lee, {Dong Jin}",
year = "2017",
month = "1",
day = "1",
doi = "10.1016/j.palaeo.2017.12.018",
language = "English",
journal = "Palaeogeography, Palaeoclimatology, Palaeoecology",
issn = "0031-0182",
publisher = "Elsevier",

}

TY - JOUR

T1 - The earliest evolutionary link of metazoan bioconstruction

T2 - Laminar stromatoporoid-bryozoan reefs from the Middle Ordovician of Korea

AU - Hong, Jongsun

AU - Oh, Jae Ryong

AU - Lee, Jeong Hyun

AU - Choh, Suk-Joo

AU - Lee, Dong Jin

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Sub-metre-scale patch reefs composed primarily of stromatoporoids and bryozoans are reported from the Duwibong Formation (upper Middle Ordovician), Taebaeksan Basin, Korea, in the eastern margin of the Sino-Korean Block. The reef framework is constructed of alternating thin laminae of the primitive labechiid stromatoporoid Cystostroma, the bryozoan Nicholsonella, subordinate Solenopora and minor siliceous sponges. Alternating laminae of stromatoporoids and bryozoans are largely responsible for the formation of a globular framework composed of columnar, branching, bulbous to irregular masses. Solenopora sporadically occurring as tiny patches or thin laminae attached to the stromatoporoid-bryozoan framework is considered to be subordinate encrusters. Siliceous sponges occur within the stromatoporoid-bryozoan framework and within the growth framework and bored cavities, interpreted as subordinate encrusters and cryptic dwellers. The compact globular framework of the Duwibong stromatoporoid-bryozoan consortium represents a new type of Ordovician skeletal bioconstruction, but with a certain structural similarity to Lower Ordovician bryozoan reefs in the South China Block. Together with coeval labechiid reefs occurring near the current study area, the Duwibong reefs suggest that incursion of the primitive stromatoporoids into the earliest bryozoan reefs resulted in the dominance of reef-building stromatoporoids in peri-Gondwana in contrast to coeval reefs in Laurentia, which commonly contain tabulate corals.

AB - Sub-metre-scale patch reefs composed primarily of stromatoporoids and bryozoans are reported from the Duwibong Formation (upper Middle Ordovician), Taebaeksan Basin, Korea, in the eastern margin of the Sino-Korean Block. The reef framework is constructed of alternating thin laminae of the primitive labechiid stromatoporoid Cystostroma, the bryozoan Nicholsonella, subordinate Solenopora and minor siliceous sponges. Alternating laminae of stromatoporoids and bryozoans are largely responsible for the formation of a globular framework composed of columnar, branching, bulbous to irregular masses. Solenopora sporadically occurring as tiny patches or thin laminae attached to the stromatoporoid-bryozoan framework is considered to be subordinate encrusters. Siliceous sponges occur within the stromatoporoid-bryozoan framework and within the growth framework and bored cavities, interpreted as subordinate encrusters and cryptic dwellers. The compact globular framework of the Duwibong stromatoporoid-bryozoan consortium represents a new type of Ordovician skeletal bioconstruction, but with a certain structural similarity to Lower Ordovician bryozoan reefs in the South China Block. Together with coeval labechiid reefs occurring near the current study area, the Duwibong reefs suggest that incursion of the primitive stromatoporoids into the earliest bryozoan reefs resulted in the dominance of reef-building stromatoporoids in peri-Gondwana in contrast to coeval reefs in Laurentia, which commonly contain tabulate corals.

KW - Darriwilian

KW - Globular framework

KW - GOBE

KW - Reef evolution

KW - Skeletal reef

UR - http://www.scopus.com/inward/record.url?scp=85039171977&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85039171977&partnerID=8YFLogxK

U2 - 10.1016/j.palaeo.2017.12.018

DO - 10.1016/j.palaeo.2017.12.018

M3 - Article

AN - SCOPUS:85039171977

JO - Palaeogeography, Palaeoclimatology, Palaeoecology

JF - Palaeogeography, Palaeoclimatology, Palaeoecology

SN - 0031-0182

ER -