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At the bottom left
This is the items page for The Legend Of Zelda: A Link To The Past. Some of these are inventory items, while others are either items found in the overworld or in Dungeons. I don't recognize the 4th medallion (marked with a red square).
I'm unable to find any concrete evidence revealing the identity of this medallion, but I'm very confident it's concept art. Let's take a look at some other pictures to see why.
Here's a close up of the four medallions from your original photo, which I've taken from the same book; The Legend of Zelda: Art and Artifacts.
In the section for the pixel art of A Link to the Past, we're treated to this image.
As you can see, there's definitely only three medallions used in the game, although I suppose that's why you're asking in the first place. Here's where it gets interesting; from the Zelda Wiki page for the Quake Medallion we find this image.
The wiki states that this is the artwork from the game's instruction manual, and it's certainly a closer representation of the pixelated design. The fact that the Art and Artifacts book doesn't include this design, and that the only designs which match the manual and pixel designs are the top two, leads me to believe that this book isn't a complete compendium of Nintendo's Zelda artwork and only features some of their works (probably allowing them to sell another edition in a few years time).
As such, I strongly believe the bottom two medallions are concept art for the Quake Medallion, or perhaps the Quake Medallion and a fourth medallion which was later scrapped. As Radhil suggests in the comments, it's not too dissimilar from the Light Medallion from Ocarina of Time, and not letting good art go to waste could've been recycled and altered after being dropped from ALTTP, although this is pure speculation.
each medallian is based on natural disasters. you have bombos which acts as wildfires or even volcanoes, ether which acts as either floods or storms, and quake acts as earthquakes. the only one really missing out of those would be a tornado, but that could relate to Ether? not exactly Ether means warm clear skies and the texts from the large tome mentions polar winds meaning a cold front and a warm front meeting. which could cause either a tornado or a hurricane depending on where it sits, so my theory is simply it was scrapped because of the Ether medallion and the close relationship as to which natural disaster it takes. my theory though is that all the medallians originally opened a dark world dungeon bombos would have been used in skull woods. Then the fire rod would be found in the ice palace instead of the blue mail and every dark world dungeon without the explicit word of palace (insinuating made be man or some form of intelligent entity) would use a medallian for entry, misery mire, skull woods, gargoyle domain, and the misery mire. Other idea is four corners use the four medallians trading the gargoyle Domain with the Ice Palace.
