div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 7button div class=ts-image amp-img class=ts-thumb alt=Page 7: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails7jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 8button div class=ts-image amp-img class=ts-thumb alt=Page 8: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails8jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 9button div class=ts-image amp-img class=ts-thumb alt=Page 9: Department of Earth and Atmospheric Sciences · concretions are common in sandstones and shales and chert concretions are common in carbonate rocks eg Tucker 1981 p 80 src=https:reader033vdocumentsusreader033viewer20220530145f127f28259093435475a41fhtml5thumbnails9jpg width=142 height=106 layout=responsive amp-img divdiv