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Abstract
This study aims to analyse the condition of the sand at Baron Beach, Gunung Kidul, which has a darker colour than the sand at surrounding beaches such as Kukup Beach, which is less than 1 km away. Through a geological approach, this study reviewed various literatures to identify the factors that influence the difference in sand colour. The literature analysis involved mineralogical, sedimentological and petrographic studies to determine the mineral composition and origin of the sand constituent materials. Based on the literature study, it was found that the content of heavy minerals, such as magnetite and ilmenite, contributes significantly to the dark colour of the sand at Baron Beach. In addition, geomorphological dynamics and erosion processes in the volcanic rocks that dominate the area are also important factors in the characteristics of sand sediments. The conclusion of this literature study provides insight into the geotourism potential of the Baron Beach area as well as the importance of understanding geological factors in sustainable beach tourism management.