Taphonomic processes in recent thanatocenoses at playa el pelícano, baja california
The northeastern coast of Baja California (Mexico) has extensive surface mollusk-shell deposits in exposed, semiprotected or protected sandy beaches. Waves, tides, currents and sediment transport influence the shell concentrations in the intertidal zone and control the morphology of these beaches....
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2000-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/604 |
| _version_ | 1797279309980762112 |
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| author | G Avila-Serrano MA Téllez-Duarte |
| author_facet | G Avila-Serrano MA Téllez-Duarte |
| author_sort | G Avila-Serrano |
| collection | DOAJ |
| description |
The northeastern coast of Baja California (Mexico) has extensive surface mollusk-shell deposits in exposed, semiprotected or protected sandy beaches. Waves, tides, currents and sediment transport influence the shell concentrations in the intertidal zone and control the morphology of these beaches. In order to evaluate the taphonomic processes involved in the formation of shell deposits in an exposed beach, we studied temporal changes in thanatocenoses of bivalves along 200 m of beach at spring tides in March, May and November 1993, and March and November 1994. Species were identified and their size, orientation (concave-up vs concave-down) and azimuth orientation of the anterior-posterior axis were measured. The assemblage was dominated by Glycymeris gigantea and included 15 common species. The shells showed a variable azimuth orientation, but with a trend parallel to the coastline, predominance of downward concavity and a polymodal size distribution with modes in 1 and 3 cm, in a size range of 0.3 to 8.5 cm. The taphonomic characteristics of these shell deposits may be useful in coastal paleoceanographic reconstructions.
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| first_indexed | 2024-03-07T16:23:26Z |
| format | Article |
| id | doaj.art-305f5c8361024c69886b61c35a31eee1 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:23:26Z |
| publishDate | 2000-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-305f5c8361024c69886b61c35a31eee12024-03-03T19:38:29ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532000-03-0126410.7773/cm.v26i4.604Taphonomic processes in recent thanatocenoses at playa el pelícano, baja californiaG Avila-Serrano0MA Téllez-Duarte1Universidad Autónoma de Baja CaliforniaUniversidad Autónoma de Baja California The northeastern coast of Baja California (Mexico) has extensive surface mollusk-shell deposits in exposed, semiprotected or protected sandy beaches. Waves, tides, currents and sediment transport influence the shell concentrations in the intertidal zone and control the morphology of these beaches. In order to evaluate the taphonomic processes involved in the formation of shell deposits in an exposed beach, we studied temporal changes in thanatocenoses of bivalves along 200 m of beach at spring tides in March, May and November 1993, and March and November 1994. Species were identified and their size, orientation (concave-up vs concave-down) and azimuth orientation of the anterior-posterior axis were measured. The assemblage was dominated by Glycymeris gigantea and included 15 common species. The shells showed a variable azimuth orientation, but with a trend parallel to the coastline, predominance of downward concavity and a polymodal size distribution with modes in 1 and 3 cm, in a size range of 0.3 to 8.5 cm. The taphonomic characteristics of these shell deposits may be useful in coastal paleoceanographic reconstructions. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/604taphonomic processesthanatocenosesbivalve mollusks |
| spellingShingle | G Avila-Serrano MA Téllez-Duarte Taphonomic processes in recent thanatocenoses at playa el pelícano, baja california Ciencias Marinas taphonomic processes thanatocenoses bivalve mollusks |
| title | Taphonomic processes in recent thanatocenoses at playa el pelícano, baja california |
| title_full | Taphonomic processes in recent thanatocenoses at playa el pelícano, baja california |
| title_fullStr | Taphonomic processes in recent thanatocenoses at playa el pelícano, baja california |
| title_full_unstemmed | Taphonomic processes in recent thanatocenoses at playa el pelícano, baja california |
| title_short | Taphonomic processes in recent thanatocenoses at playa el pelícano, baja california |
| title_sort | taphonomic processes in recent thanatocenoses at playa el pelicano baja california |
| topic | taphonomic processes thanatocenoses bivalve mollusks |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/604 |
| work_keys_str_mv | AT gavilaserrano taphonomicprocessesinrecentthanatocenosesatplayaelpelicanobajacalifornia AT matellezduarte taphonomicprocessesinrecentthanatocenosesatplayaelpelicanobajacalifornia |