Rubuta ci gaba ga wannan sakin layi - Tare da bayyanar da ƙananan ƙungiyoyi na rukuni a cikin ambaliyar ruwa na 1993
, an nuna dukkanin Majalisar Grove Group, daga hillcrest Speiser Shale har zuwa tafkin-matakin Americus limestone, don nazari daga sama zuwa kasa a cikin Tuttle Creek Lake Spillway.