*The Ampferer-Type Subduction: A Case of Missing Arc Magmatism DOI: http://dx.doi.org/10.5772/intechopen.109406*

### **Figure 9.**

*Tentative reconstruction of the Variscan and surrounding areas at successive intervals from middle Ordovician (465 Ma) to Lower Carboniferous (340 Ma) [166] continental microplates. Blue, island arcs; black squares, distribution of Callixylon (petrified trees) in the Late Devonian (375 Ma).*

but post-orogenic magma-rich collapse. In contrast, orogenic belts formed from the closure of broad oceans floored with Penrose-type crust (Benioff-type subduction) are characterized by arc magmatism but post-orogenic magma-poor collapse.
