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Geologist Damar Kusumanto maps an
outcrop of volcanic rock (Trenggalek)
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Silicified breccia capping forms a prominent reddish
flat-topped hill at Dalangturu Prospect (Trenggalek)
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Outcrop of a high-grade breccia vein
at Sentul Prospect (Trenggalek )
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Geologists inspecting high-grade vein boulders
at Jati Prospect (Trenggalek)
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High-grade vein boulder showing multiple stages of veining & brecciation at Jombok Prospect (Trenggalek)
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Local feldspar mining on a rhyodacite flow-dome is surrounded by silicified breccia cappings at Timahan Prospect (Trenggalek)
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