diff --git a/core/assets-raw/sprites/blocks/environment/ferric-craters3.png b/core/assets-raw/sprites/blocks/environment/ferric-craters3.png
index 609d670889..b7c0ba0a49 100644
Binary files a/core/assets-raw/sprites/blocks/environment/ferric-craters3.png and b/core/assets-raw/sprites/blocks/environment/ferric-craters3.png differ
diff --git a/core/assets-raw/sprites/blocks/environment/ferrous.png b/core/assets-raw/sprites/blocks/environment/ferrous.png
deleted file mode 100644
index d2dfe8ad6b..0000000000
Binary files a/core/assets-raw/sprites/blocks/environment/ferrous.png and /dev/null differ
diff --git a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
index 1fb20abace..89f5a99abf 100644
--- a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
+++ b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
@@ -103,9 +103,9 @@ public class ErekirPlanetGenerator extends PlanetGenerator{
 
             pass((x, y) -> {
                 if(floor != Blocks.redIce){
-                    float noise = noise(x + 782, y, 7, 0.8f, 310f, 1f);
-                    if(noise > 0.64f){
-                        if(noise > 0.72f){
+                    float noise = noise(x + 782, y, 7, 0.8f, 280f, 1f);
+                    if(noise > 0.62f){
+                        if(noise > 0.7f){
                             floor = Blocks.slag;
                         }else{
                             floor = Blocks.yellowStone;