Complex sentence: Dirat at Tulul forms the northernmost extension of the massive alkaline lava field of Harrat Ash Shamah where it borders in the south Es Safa lava field, another part of that massive Lava region.
Split into simpler sentences: Dirat at Tulul forms the northernmost extension of the massive alkaline lava field of Harrat Ash Shamah. To the south it is bordered by the Es Safa lava field, another part of the massive Harrat Ash Shamah lava region.