▁of ▁families ▁and ▁ 1 2 . 1 % ▁of ▁the ▁population ▁were ▁below ▁the ▁pover ty ▁line , ▁including ▁ 2 4 . 0 % ▁of ▁those ▁under ▁age ▁ 1 8 ▁and ▁ 1 3 . 5 % ▁of ▁those ▁age ▁ 6 5 ▁or ▁over . ▁ ▁References ▁ ▁Category : T own ships ▁in ▁Som erset ▁County , ▁Pennsylvania <0x0A> </s> ▁The ▁Ok av ango ▁Dy ke ▁Sw arm ▁is ▁a ▁giant ▁dy ke ▁sw arm ▁of ▁the ▁Kar oo ▁Lar ge ▁Ig ne ous ▁Province ▁in ▁n ortheast ▁B ots w ana , ▁southern ▁Africa . ▁It ▁consists ▁of ▁a ▁group ▁of ▁Pro ter oz o ic ▁and ▁Jur ass ic ▁dy kes , ▁tr ending ▁east - s out heast ▁across ▁B ots w ana , ▁sp anning ▁a ▁region ▁nearly ▁ ▁long ▁and ▁ ▁wide . ▁The ▁Jur ass ic ▁dy kes ▁were ▁formed ▁approximately ▁ 1 7 9 ▁million ▁years ▁ago , ▁composed ▁of ▁mainly ▁th ole i it ic ▁ma fic ▁rocks . ▁The ▁formation ▁is ▁related ▁to ▁the ▁mag mat ism ▁at ▁the ▁Kar oo ▁triple ▁j unction , ▁induced ▁by ▁the ▁plate ▁t ect onic ▁break ▁up ▁of ▁the ▁G ond w ana ▁super cont inent ▁in ▁the ▁early ▁Jur ass ic . ▁▁ ▁__ TO C __ ▁ ▁Ge ological ▁information ▁ ▁The ▁Ok av ango ▁Dy ke ▁Sw arm ▁over laps ▁with ▁the ▁Leb om bo ▁and ▁Save - L imp opo ▁Dy ke ▁Sw ar ms ▁at ▁Kar oo