Situs Warisan Geologi
Teluk Pacitan
Teluk Pacitan bagian timur dan barat dapat diamati 5 seri undak-pantai yang terletak beberapa meter sehingga sekitar 100 meter dml. Karena letaknya yang berada di pinggir jalur penumpuan lempeng aktif, undak-pantai itu lebih banyak dipengaruhi oleh pengangkatan tektonik dari pada perubahan muka laut. Dua permukaan undak di bagian bawah (undak I dan undak-II) mempunyai kedudukan mendatar. Sedang Undak-III, IV dan V miring ke selatan sebesar 4 derajat – 5 derajat. Undak-undak ini menggambarkan peristiwa pengangkatan yang terjadi beberapa kali, dimana pinggiran teluk telah mengalami pemiringan sebelum Undak – II terbentuk.
Pacitan Bay in the east and west can be observed 5 series of coastal steps which are located a few meters so that it is around 100 meters dml. Due to its location on the edge of an active plate bearing path, the coast is affected more by tectonic uplift than by changes in sea level. The two surface steps at the bottom (steps I and steps II) have a horizontal position. While Steps-III, IV and V are tilted to the south by 4 degrees – 5 degrees. These steps describe lifting events that occurred several times, where the edge of the bay had experienced tilt before Steps – II were formed.
Teluk Pacitan bagian barat tersingkap batuan terobosan andesit yang terkekarkan dan tersesarkan utara-selatan, yang ditindih tak selaras batugamping Formasi Wonosari. Sebagian permukaan andesit lapuk mengulit bawang. Sisa hutan tropis yang tidak begitu luas memiliki tajuk pohon seperti aslinya hutan primer. Hutan dihuni oleh monyet berbulu kelabu.
The western part of Pacitan Bay is exposed by andesitic intrusions that are fractured and drifted north-south, which are unconformably overlain by the limestone of the Wonosari Formation. Part of the weathered andesite surface peels onions. The rest of the tropical forest which is not so extensive has a tree canopy like the original primary forest. The forest is inhabited by gray hairy monkeys.
Dipinggir sungai kecil yang bermuara di teluk bagian barat banyak dijumpai ostrea yang menempel dipermukaan bongkahan batugamping. Ostrea yang sudah mati menempel di ketinggian sekitar 1,5 meter dari permukaan rata rata sungai. Yang masih hidup berada di bawah pengaruh pasang surut air laut. Fenomena ini menunjukan masih aktifnya pengangkatan Teluk pacitan.
Di depan muara Sungai Grindulu, di bagian timur teluk , yang berombak besar menjadi lokasi berselancar yang menantang. Di Pantai Pancer ini sedang dibangun pusat Informasi Geopark Gunung Sewu.
On the edge of a small river that empties into the western part of the bay, you can find ostrea attached to the surface of the limestone blocks. The dead Ostrea clings to a height of about 1.5 meters from the average surface of the river. The survivors are under the influence of the tides. This phenomenon shows the active lifting of Pacitan Bay.
In front of the mouth of the Grindulu River, in the eastern part of the bay, which has big waves, it becomes a challenging surfing location. At Pancer Beach, the Gunung Sewu Geopark Information Center is being built.