div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Home Royal Museum for Central Africa - Tervuren - Belgium · older thick rhyolitic cover of fissural origin and do not seem to have acted as central volcanoes as in Niger or in src=https:reader033fdocumentsusreader033viewer20220607046070c0596140ee7b1619b543html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Home Royal Museum for Central Africa - Tervuren - Belgium · older thick rhyolitic cover of fissural origin and do not seem to have acted as central volcanoes as in Niger or in src=https:reader033fdocumentsusreader033viewer20220607046070c0596140ee7b1619b543html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 3button div class=trans-image amp-img class=trans-thumb alt=Page 3: Home Royal Museum for Central Africa - Tervuren - Belgium · older thick rhyolitic cover of fissural origin and do not seem to have acted as central volcanoes as in Niger or in src=https:reader033fdocumentsusreader033viewer20220607046070c0596140ee7b1619b543html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 4button div class=trans-image amp-img class=trans-thumb alt=Page 4: Home Royal Museum for Central Africa - Tervuren - Belgium · older thick rhyolitic cover of fissural origin and do not seem to have acted as central volcanoes as in Niger or in src=https:reader033fdocumentsusreader033viewer20220607046070c0596140ee7b1619b543html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 5button div class=trans-image amp-img class=trans-thumb alt=Page 5: Home Royal Museum for Central Africa - Tervuren - Belgium · older thick rhyolitic cover of fissural origin and do not seem to have acted as central volcanoes as in Niger or in...