Pregled bibliografske jedinice broj: 1117669
Pelagosite revisited: The origin and significance of a laminated aragonitic encrustation of Mediterranean supralittoral rocks
Pelagosite revisited: The origin and significance of a laminated aragonitic encrustation of Mediterranean supralittoral rocks // 250 Million Years of Earth History in Central Italy: Celebrating 25 Years of the Geological Observatory of Coldigioc / Koeberl, Christian ; Bice, David M. (ur.).
Boulder (CO): Geological Society of America, 2019. str. 501-532
CROSBI ID: 1117669 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Pelagosite revisited: The origin and significance of a laminated aragonitic encrustation of Mediterranean supralittoral rocks
Autori
Montanari, Alessandro ; Bice, David M. ; Jull, A. J. Timothy ; Kudryavtsev, Anatoliy B. ; Macalady, Jennifer L. ; Schaperdoth, Irene ; Sharp, Warren D. ; Shimabukuro, David ; Schopf, William J. ; Vučetić, Višnjica
Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni
Knjiga
250 Million Years of Earth History in Central Italy: Celebrating 25 Years of the Geological Observatory of Coldigioc
Urednik/ci
Koeberl, Christian ; Bice, David M.
Izdavač
Geological Society of America
Grad
Boulder (CO)
Godina
2019
Raspon stranica
501-532
ISBN
9780813795423
Ključne riječi
pelagosite ; climate changes ; Mediterranean rocky coasts ;
(pelagosite ; climate changes ; Mediterranean rocky coast)
Sažetak
In this paper, we review ~140 yr of investigations about pelagosite, a usually black aragonitic encrustation with a vitreous luster that forms in the splash zone of Mediterranean rocky coasts. Prior to the mid-1920s, the geologic community considered pelagosite to be a separate mineral of uncertain composition, but then in 1926, Italian mineralogist Ettore Onorato determined that pelagosite has the same structure as aragonite (orthorhombic CaCO3), and also that it contained cells of blue-green algae (i.e., cyanobacteria). Once pelagosite was declassed from the status of a mineral, and its name was eliminated from catalogues and textbooks, Onorato’s documentation of the cyanobacterial cells contained in this encrustation seems to have fallen into almost total oblivion during the rest of the twentieth century. We revisited pelagosite in its original type locality, the remote southern Adriatic island of Pelagosa (today’s Croatian island of Palagruža), as well as in the Dalmatian island of Hvar. Using modern analytical methods and techniques, we redefined the mineralogical and geochemical composition of pelagosite, the nature and significance of its microbial content, and the origin of its pisolitic “tree-ring” internal structure, which probably reflects cyclic climate changes.
Izvorni jezik
Engleski
Znanstvena područja
Geofizika
