minecraft has crashed

  Minecraft has crashed!      
      ----------------------      

Minecraft has stopped running because it encountered a problem; Failed to start game

A full error report has been saved to C:\Users\Michelle\AppData\Roaming\.minecraft\crash-reports\crash-2013-06-25_13.42.10-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash :(



--- BEGIN ERROR REPORT 97b2fbb7 --------
Full report at:
C:\Users\Michelle\AppData\Roaming\.minecraft\crash-reports\crash-2013-06-25_13.42.10-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 6/25/13 1:42 PM

-- System Details --
Details:
	Minecraft Version: 1.5.2
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 403911792 bytes (385 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP v7.51 FML v5.2.12.710 Minecraft Forge 7.8.0.710 5 mods loaded, 5 mods active
	mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
	FML{5.2.12.710} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
	Forge{7.8.0.710} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
	FlansMod{2.3.1} [Flan's Mod] (Flans Mod 2.3.1 for Minecraft 1.5.2 Universal.zip) Unloaded->Constructed->Pre-initialized->Initialized
	fossil{1.5.2 0005} [Fossil/Archeology] (fossil-archeology-Build_5_PreRelease.zip) Unloaded->Constructed->Pre-initialized->Errored
	LWJGL: 2.4.2
	OpenGL: Intel(R) HD Graphics 2500 GL version 4.0.0 - Build 9.17.10.2792, Intel
	Is Modded: Definitely; Client brand changed to 'fml,forge'
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

java.lang.IllegalArgumentException: Slot 4095 is already occupied by co.uk.flansmods.common.BlockPlaneWorkbench@5334f4 when adding mods.fossil.blocks.BlockPalaeSlab@b9b19a
	at net.minecraft.block.Block.<init>(Block.java:340)
	at net.minecraft.block.BlockHalfSlab.<init>(SourceFile:19)
	at mods.fossil.blocks.BlockPalaeSlab.<init>(BlockPalaeSlab.java:24)
	at mods.fossil.Fossil.Init(Fossil.java:877)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:494)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
	at com.google.common.eventbus.EventBus.post(EventBus.java:267)
	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
	at com.google.common.eventbus.EventBus.post(EventBus.java:267)
	at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)
	at cpw.mods.fml.common.Loader.initializeMods(Loader.java:690)
	at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:206)
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:448)
	at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
	at net.minecraft.client.Minecraft.run(Minecraft.java:733)
	at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 83d38eb7 ----------