orthogeosyncline

== English == === Etymology === From ortho- +‎ geosyncline. === Noun === orthogeosyncline (plural orthogeosynclines) (geology) A linear geosynclinal belt lying between continental and oceanic cratons, and having internal volcanic belts (eugeosynclinal) and external nonvolcanic belts (miogeosynclinal). Also known as geosynclinal couple; primary geosyncline.