lower boundary defined by

7 triples
GPTKB property

Random triples
Subject Object
gptkb:Jiangshanian_Stage first appearance of Agnostotes orientalis
gptkb:Stage_3_(Cambrian) first appearance of trilobites (proposed)
gptkb:Drumian_Stage first appearance of Ptychagnostus atavus
gptkb:Stage_10_of_the_Cambrian first appearance of the conodont Eoconodontus notchpeakensis (proposed)
gptkb:Paibian_Stage first appearance of trilobite Glyptagnostus reticulatus
gptkb:Paibian_stage first appearance of trilobite Glyptagnostus reticulatus
gptkb:Jiangshanian_stage First appearance of Agnostotes orientalis