I read both of those and with the help of an online loot table generator, I was able to see how it is constructed. I ended up successfully modifying the gravel loot table. Thanks...
{
"type": "minecraft:block",
"pools": [
{
"rolls": 1,
"bonus_rolls": 0,
"entries": [
{
"type": "minecraft:alternatives",
"children": [
{
"type": "minecraft:item",
"name": "minecraft:gravel",
"conditions": [
{
"condition": "minecraft:match_tool",
"predicate": {
"enchantments": [
{
"enchantment": "minecraft:silk_touch",
"levels": {
"min": 1
}
}
]
}
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:flint",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.45
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:coal",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.20
}
]
},
{
"type": "minecraft:item",
"name": "foundations:iron_nugget_ore",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.057
}
]
},
{
"type": "minecraft:item",
"name": "foundations:clay_ore",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.038
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:raw_iron",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.0075
}
]
},
{
"type": "minecraft:item",
"name": "foundations:gold_nugget_ore",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.0025
}
]
},
{
"type": "minecraft:alternatives",
"conditions": [
{
"condition": "minecraft:survives_explosion"
}
],
"children": [
{
"type": "minecraft:item",
"name": "minecraft:flint",
"conditions": [
{
"condition": "minecraft:table_bonus",
"enchantment": "minecraft:fortune",
"chances": [
0.1,
0.142387,
0.25,
1.0
]
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:gravel"
}
]
}
]
}
]
}
]
}
{
"type": "minecraft:block",
"pools": [
{
"rolls": 1,
"bonus_rolls": 0,
"entries": [
{
"type": "minecraft:alternatives",
"children": [
{
"type": "minecraft:item",
"name": "minecraft:gravel",
"conditions": [
{
"condition": "minecraft:match_tool",
"predicate": {
"enchantments": [
{
"enchantment": "minecraft:silk_touch",
"levels": {
"min": 1
}
}
]
}
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:flint",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.45
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:coal",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.20
}
]
},
{
"type": "minecraft:item",
"name": "foundations:iron_nugget_ore",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.057
}
]
},
{
"type": "minecraft:item",
"name": "foundations:clay_ore",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.038
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:raw_iron",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.0075
}
]
},
{
"type": "minecraft:item",
"name": "foundations:gold_nugget_ore",
"conditions": [
{
"condition": "minecraft:random_chance",
"chance": 0.0025
}
]
},
{
"type": "minecraft:alternatives",
"conditions": [
{
"condition": "minecraft:survives_explosion"
}
],
"children": [
{
"type": "minecraft:item",
"name": "minecraft:flint",
"conditions": [
{
"condition": "minecraft:table_bonus",
"enchantment": "minecraft:fortune",
"chances": [
0.1,
0.142387,
0.25,
1.0
]
}
]
},
{
"type": "minecraft:item",
"name": "minecraft:gravel"
}
]
}
]
}
]
}
]
}
I treat gravel as a filter catch-all. Some extra minor drops - adding some nugget ores so you don't get iron ores dropping from gravel except on rare occurrence. Clay ore is a new item I've implemented that drops from a new clay block added to regular clay generation.
...edited the loot table. It was an older one while I was building it. This one is the complete loot table.