The possible role of the bio-erosion on the stability of sea cliffs in Ryukyu Archipelago
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
CRC Press/Balkema
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
It is known that some bivalve organisms or similar organisms can bore holes in rock formations consisting of such as limestone, sandstone, andesite and tuff. The authors investigated some sites Ryukyu Archıpelago, Japan and found many examples of bored rocks by bivalve organisms. The unixial compressive strength of these rocks are more than 25 MPa and it is unlikely such organisms could mechanically break down such rocks. The most likely mechanism would be the dissolution of constituents of rocks by enzym/salvia produced by these organism and their subsequent discharge of debris from the holes. The length of bored holes is generally 5–15 cm with a diameter of 1–25 mm. The bored rock sites are found to be within the tidal zone. Besides porous structures resulting from bored holes due to organisms, the action of sea waves due to hurricanes, typhoons impose some impact type forces on rocks. This study is concerned on the role of bivalve and other organisms on the toe erosion along sea cliffs and their subsequent collapse. First organisms are described and then their effect of the cliffs are considered and several examples from Ryukyu Archipelago are given. It is shown that the effect of organisms resulting in bio-erosion on cliffs must be taken into account. © 2024 The Author(s).
Açıklama
ISRM European Rock Mechanics Symposium, EUROCK 2024 -- 15 July 2024 through 19 June 2024 -- Alicante -- 315419
Anahtar Kelimeler
Compressive strength, Erosion, Hurricanes, Landforms, Lime, Molluscs, Bore holes, Break down, Most likely, Porous structures, Rock formations, Rock sites, Ryukyu archipelagos, Sea waves, Sea-cliff, Tidal zones, Rocks
Kaynak
New Challenges in Rock Mechanics and Rock Engineering - Proceedings of the ISRM Rock Mechanics Symposium, EUROCK 2024
WoS Q Değeri
Scopus Q Değeri
N/A
