Inventarisasi Keragaman Geologi Daerah Mawasangka Timur, Buton Tengah, Sulawesi Tenggara

Abstract

Fenomena geologi yang berhubungan dengan
aspek bentang alam di daerah Mawasangka Timur,
Kabupaten Buton Tengah, Provinsi Sulawesi Tenggara
mempunyai fitur yang beragam dan secara umum disusun
oleh satuan batugamping Formasi Wapulaka yang berumur
Pleistosen. Penelitian ini bertujuan untuk menginventarisasi
potensi keragaman geologi (geodiversity) yang mendasarkan
pada aspek bentang alam karst dan pantai. Fitur keragaman
geologi di kawasan karst mencakup baik gejala endokarst
seperti gua dan ragam jenis hiasan gua di dalamnya maupun
gejala exokarst seperti bukit pepino, dolina, dan akumulasi
air di lekuk dolina yang membentuk danau. Di kawasan
pantai terjadi sedimentasi pasir putih di pantai landai yang
penyebarannya membentuk spit, serta undak-pantai, stack,
notches dan sea-cave. Aneka fitur fenomena geologi yang
terinventarisasi tersebut didukung oleh struktur geologi.
Metode penelitian yang digunakan adalah melakukan
inventarisasi melalui pemetaan keragaman geologi, yaitu
berupa pengambilan data lapangan meliputi, litologi,
geomorfologi, dan struktur geologi, yang dilengkapi
informasi titik koordinat lokasi dan potret). Keragaman
geologi tersebut tersebar di seluruh wilayah penelitian,
terutama di bagian selatan dan timur.

Kata Kunci: Keragaman geologi, Wapulaka, karst, dolina,
gua, Mawasangka Timur

Abstract

Geological phenomena related to landscape
aspects in the East Mawasangka area, Central Buton
Regency, Southeast Sulawesi Province have diverse
features, which are mainly composed of limestone units
of the Pleistocene Wapulaka Formation. This study aims
to inventory the potential of geological diversity based
on aspects of karst and coastal landscapes. Features
of geological diversity in karstic areas include both
endokarst phenomena such as caves and various types
of cave decoration as well as exokarst phenomena such
as pepino hills, doline, and water accumulation in doline
depressions that form lakes. In the coastal area, white sand
sedimentation occurs on sloping beaches that spread to
form spits, as well as coastal terraces, stacks, notches, and
sea caves. The various features of the inventoried geological
phenomena are supported by geological structures. The
research method used was to conduct an inventory through
geological diversity mapping, in the form of field data
collection (lithology, geomorphology, geological structure,
location coordinates, and portraits). The geological
diversity is spread throughout the study area, especially in
the south and east.

Keywords: Geodiversity, Wapulaka, karst, doline, cave,
East Mawasangka