This gens a world that tends to have flat volcanoes. The site I indicate is kinda odd, in that the volcano itself is flat, but it has some neat cubic mountains next to it (that's where the surface flux is). No river, sadly, but there's hematite and lots of trees for charcoal.
[WORLD_GEN]
[TITLE:FLAT]
[SEED:1162983175]
[HISTORY_SEED:4172155246]
[NAME_SEED:745585574]
[CREATURE_SEED:2720010330]
[DIM:65:65]
[EMBARK_POINTS:1274]
[END_YEAR:100]
[BEAST_END_YEAR:2:50]
[REVEAL_ALL_HISTORY:1]
[CULL_HISTORICAL_FIGURES:1]
[ELEVATION:50:350:800:800]
[RAINFALL:50:100:800:800]
[TEMPERATURE:45:55:200:200]
[DRAINAGE:0:100:400:400]
[VOLCANISM:0:100:3200:3200]
[SAVAGERY:20:100:1600:1600]
[ELEVATION_FREQUENCY:1:1:1:1:1:1]
[RAIN_FREQUENCY:1:1:1:1:1:1]
[DRAINAGE_FREQUENCY:1:1:1:1:1:1]
[TEMPERATURE_FREQUENCY:1:1:1:1:1:1]
[SAVAGERY_FREQUENCY:1:1:1:1:1:1]
[VOLCANISM_FREQUENCY:1:1000:500:500:0:1000]
[MINERAL_SCARCITY:1000]
[MEGABEAST_CAP:75]
[SEMIMEGABEAST_CAP:150]
[TITAN_NUMBER:33]
[TITAN_ATTACK_TRIGGER:80:0:100000]
[DEMON_NUMBER:52]
[NIGHT_CREATURE_NUMBER:52]
[GOOD_SQ_COUNTS:500:1000:5000]
[EVIL_SQ_COUNTS:100:500:500]
[PEAK_NUMBER_MIN:0]
[PARTIAL_OCEAN_EDGE_MIN:0]
[COMPLETE_OCEAN_EDGE_MIN:0]
[VOLCANO_MIN:150]
[REGION_COUNTS:SWAMP:0:0:0]
[REGION_COUNTS:DESERT:0:0:0]
[REGION_COUNTS:FOREST:0:0:0]
[REGION_COUNTS:MOUNTAINS:0:0:0]
[REGION_COUNTS:OCEAN:0:0:0]
[REGION_COUNTS:GLACIER:0:0:0]
[REGION_COUNTS:TUNDRA:0:0:0]
[REGION_COUNTS:GRASSLAND:0:0:0]
[REGION_COUNTS:HILLS:0:0:0]
[EROSION_CYCLE_COUNT:1]
[RIVER_MINS:200:200]
[PERIODICALLY_ERODE_EXTREMES:1]
[OROGRAPHIC_PRECIPITATION:1]
[SUBREGION_MAX:5000]
[CAVERN_LAYER_COUNT:3]
[CAVERN_LAYER_OPENNESS_MIN:50]
[CAVERN_LAYER_OPENNESS_MAX:100]
[CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
[CAVERN_LAYER_PASSAGE_DENSITY_MAX:5]
[CAVERN_LAYER_WATER_MIN:0]
[CAVERN_LAYER_WATER_MAX:100]
[HAVE_BOTTOM_LAYER_1:1]
[HAVE_BOTTOM_LAYER_2:1]
[LEVELS_ABOVE_GROUND:15]
[LEVELS_ABOVE_LAYER_1:10]
[LEVELS_ABOVE_LAYER_2:5]
[LEVELS_ABOVE_LAYER_3:5]
[LEVELS_ABOVE_LAYER_4:5]
[LEVELS_ABOVE_LAYER_5:5]
[LEVELS_AT_BOTTOM:5]
[CAVE_MIN_SIZE:5]
[CAVE_MAX_SIZE:500]
[MOUNTAIN_CAVE_MIN:200]
[NON_MOUNTAIN_CAVE_MIN:25]
[ALL_CAVES_VISIBLE:0]
[SHOW_EMBARK_TUNNEL:2]
[TOTAL_CIV_NUMBER:30]
[TOTAL_CIV_POPULATION:40000]
[SITE_CAP:1500]
[PLAYABLE_CIVILIZATION_REQUIRED:1]
[ELEVATION_RANGES:0:0:0]
[RAIN_RANGES:0:0:0]
[DRAINAGE_RANGES:0:0:0]
[SAVAGERY_RANGES:0:0:0]
[VOLCANISM_RANGES:0:0:0]
And the embark location is here (I've no idea why it's not showing the blinky X's. If anyone knows how to cap them in a screen shot I'd be appreciative). On the World Map, it's the purple mountain in the first column, in the region map, it's where the abandoned settlement is.
If you use it, make sure to choose "The Furnaces of Channeling" as your civ, the other dwarf civ is dead.