Ithink there is not different types of lava
This answer is retarded because there is silica rich and silica poor magma^^ some people are not that smart
Magma has to enter the magma chamber beneath Arenal.
Stravolcano
basalt
Collision
I'm courta
blocky lava flow
Arenal is not a city.It is the Arenal lake or Arenal Volcano.
Arenal Volcano is an active andesitic stratovolcano in north west Costa Rica.It's "normal" type of eruptions are strombolian. [See related link]
Arenal, Costa Rica!
The Arenal volcano and Arenal lake are located in San Carlos, La Fortuna.
Concepción Arenal died in 1893.
Concepción Arenal was born in 1820.