BIOSTRATIGRAFI KALA HOLOSEN TITIK CORE TR1926B, CEKUNGAN UTARA SELAT MAKASSAR, BERDASARKAN KUMPULAN FORAMINIFERA PLANKTONIK

Marvel Samgar Amadeus, Lia Jurnaliah, Lili Fauzielly, Marfasran Hendrizan

Abstrak


Penelitian ini berfokus pada analisis biostratigrafi Kala Holosen di Cekungan Utara Selat Makassar berdasarkan kumpulan foraminifera planktonik dari inti core TR1926B. Interval core yang diteliti (182 – 206 cm) tersusun atas lempung berwarna hijau keabuan hingga abu-abu kehitaman dengan komponen fragmen cangkang skeleta. Berdasarkan penanggalan radiokarbon, interval yang diteliti berada pada rentang umur 9.966 hingga 11.774 tahun lalu. Sebanyak 8.136 individu foraminifera planktonik yang berasal dari 50 spesies dan 15 genus berhasil diidentifikasi dari total 23 sampel. Analisis biostratigrafi menurut zona Bolli & Saunders dan Blow menunjukkan bahwa interval yang diteliti masuk dalam Kala Holosen (Zona N23 Akhir), ditandai dengan kemunculan Globorotalia ungulata yang konsisten dari 11.774 hingga 9.966 tahun lalu. Spesies pendukung lainnya seperti Globigerina bermudezi, Globorotalia fimbriata, Globigerinella calida, dan Beella praedigitata ditemukan secara episodik dan tidak konsisten. Hasil penelitian ini memberikan wawasan mengenai biostratigrafi dan transisi iklim awal Holosen, serta menjadi landasan untuk studi paleoklimatologi lebih lanjut di wilayah ini.

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Referensi


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DOI: https://doi.org/10.24198/bsc.v23i2.61806

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